Eastern Orthodox Church

Eastern Orthodox Church
; Eastern Orthodox Church
	Saint George's Cathedral, Istanbul, Turkey
Classification	Eastern Orthodoxy
Orientation	Eastern Christianity
Scripture	Septuagint, New Testament
Theology	Eastern Orthodox theology
Polity	Episcopal
Governance	Autocephaly
Structure	Communion
Primus inter pares	Bartholomew,; Ecumenical Patriarch of Constantinople
Region	Primarily Southeastern Europe, Eastern Europe, Northern Asia, Levant, Egypt, Northern America, Near East, Caucasia, Cyprus
Language	Koine Greek, Church Slavonic, and other vernacular
Liturgy	Byzantine Rite and Western Rite
Founder	Jesus Christ, according to sacred tradition
Origin	1st century ; Judaea, Roman Empire
Members	230 million
Other name(s)	Orthodox Church, Orthodox Christian Church, Orthodox Catholic Church

The Eastern Orthodox Church, officially the Orthodox Catholic Church,^[9]^[10]^[11] and also called the Greek Orthodox Church^[12] or simply the Orthodox Church, is the second-largest Christian church,^[a]^[13]^[14] with approximately 230 million baptised members. It operates as a communion of autocephalous churches, each governed by its bishops via local synods.^[15] The church has no central doctrinal or governmental authority analogous to the head of the Catholic Church (the pope). Nevertheless, the Ecumenical Patriarch of Constantinople is recognised by them as primus inter pares ("first among equals"),^[16]^[17]^[18]^[19]^[20] a title formerly given to the patriarch of Rome. As one of the oldest surviving religious institutions in the world, the Eastern Orthodox Church has played an especially prominent role in the history and culture of Eastern and Southeastern Europe.^[21]

Eastern Orthodox theology is based on the Scriptures and holy tradition, which incorporates the dogmatic decrees of the seven ecumenical councils, and the teaching of the Church Fathers. The church teaches that it is the one, holy, catholic and apostolic church established by Jesus Christ in his Great Commission,^[22] and that its bishops are the successors of Christ's apostles.^[23] It maintains that it practises the original Christian faith, as passed down by holy tradition. Its patriarchates, descending from the pentarchy, and other autocephalous and autonomous churches, reflect a variety of hierarchical organisation. It recognises seven major sacraments, of which the Eucharist is the principal one, celebrated liturgically in synaxis. The church teaches that through consecration invoked by a priest, the sacrificial bread and wine become the body and blood of Christ. The Virgin Mary is venerated in the Eastern Orthodox Church as the God-bearer and honoured in devotions.

The Churches of Constantinople, Alexandria, Jerusalem, and Antioch—except for some breaks of communion such as the Photian schism or the Acacian schism—shared communion with the Church of Rome until the East–West Schism in 1054. The 1054 schism was the culmination of mounting theological, political, and cultural disputes, particularly over the authority of the pope, between those churches. Before the Council of Ephesus in AD 431, the Church of the East also shared in this communion, as did the various Oriental Orthodox Churches before the Council of Chalcedon in AD 451, all separating primarily over differences in Christology.

The Eastern Orthodox Church is the primary religious denomination in Russia, Ukraine, Romania, Greece, Belarus, Serbia, Bulgaria, Georgia, Moldova, North Macedonia, Cyprus, Montenegro, one of the main religious sects in Albania, Bosnia and Herzegovina, Kosovo, Lebanon, a significant sect in Syria, Iraq and other countries in the Middle East. Roughly half of Eastern Orthodox Christians live in the post Eastern Bloc countries, mostly in Russia.^[24]^[25] The communities in the former Byzantine regions of North Africa, the Eastern Mediterranean are among the oldest Orthodox communities from the Middle East, which are decreasing due to forced migration driven by increased religious persecution.^[26]^[27] Eastern Orthodox communities outside Western Asia, Asia Minor, Caucasia and Eastern Europe, including those in North America, Western Europe, and Australia, have been formed through diaspora, conversions, and missionary activity.

Name and characteristics

Definition

The Eastern Orthodox Church is defined as the Eastern Christians which recognise the seven ecumenical councils and usually are in communion with the Ecumenical Patriarchate, the Patriarchate of Alexandria, the Patriarchate of Antioch, and the Patriarchate of Jerusalem. The Eastern Orthodox churches "are defined positively by their adherence to the dogmatic definitions of the seven [ecumenical] councils, by the strong sense of not being a sect or a denomination but simply continuing the Christian church, and, despite their varied origins, by adherence to the Byzantine rite". Those churches are negatively defined by their rejection of papal immediate and universal supremacy.^[28]

The seven ecumenical councils recognised by the Eastern Orthodox churches are: Nicaea I, Constantinople I, Ephesus, Chalcedon, Constantinople II, Constantinople III, and Nicaea II.^[29]^[30] Those churches consider the Quinisext Council "shar[es] the ecumenical authority of Constantinople III.^[30] "By an agreement that appears to be in place in the [Eastern] Orthodox world, possibly the council held in 879 to vindicate the Patriarch Photius will at some future date be recognized as the eighth [ecumenical] council" by the Eastern Orthodox Church.^[29]

Western Rite Orthodoxy exists both outside and inside Eastern Orthodoxy. Within Eastern Orthodoxy, it is practised by a vicariate of the Antiochian Orthodox church.^[31]

Name

In keeping with the church's teaching on universality and with the Nicene Creed, Eastern Orthodox authorities such as Raphael of Brooklyn have insisted that the full name of the church has always included the term "Catholic", as in "Holy Orthodox Catholic Apostolic Church".^[32]^[33]

The official name of the Eastern Orthodox Church is the "Orthodox Catholic Church".^[9]^[10]^[11]^[34] It is the name by which the church refers to itself^[35]^[36]^[37]^[38]^[39]^[40] and which is issued in its liturgical or canonical texts.^[41]^[42] Eastern Orthodox theologians refer to the church as Catholic.^[43]^[44] This name and longer variants containing "Catholic" are also recognised and referenced in other books and publications by secular or non-Eastern Orthodox writers.^[45]^[46]^[47]^[48]^[49]^[50] The catechism of Philaret (Drozdov) of Moscow published in the 19th century is titled: The Longer Catechism of the Orthodox, Catholic, Eastern Church^[51] (Russian: Пространный христианский катехизис православныя, кафолическия восточныя Церкви).

From ancient times through the first millennium, Greek was the most prevalent shared language in the demographic regions where the Byzantine Empire flourished, and Greek, being the language in which the New Testament was written, was the primary liturgical language of the church. For this reason, the eastern churches were sometimes identified as "Greek" (in contrast to the "Roman" or "Latin" church, which used a Latin translation of the Bible), even before the Great Schism of 1054. After 1054, "Greek Orthodox" or "Greek Catholic" marked a church as being in communion with Constantinople, much as "Catholic" did for communion with the Catholic Church.^[12]

In Hungarian, the church is still commonly called "Eastern Greek" (Hungarian: Görögkeleti). This identification with Greek, however, became increasingly confusing with time. Missionaries brought Eastern Orthodoxy to many regions without ethnic Greeks, where the Greek language was not spoken. In addition, struggles between Rome and Constantinople to control parts of Southeastern Europe resulted in the conversion of some churches to the Catholic Church, which then also used "Greek Catholic" to indicate their continued use of the Byzantine rites. Today, only a minority of Eastern Orthodox adherents use Greek as the language of worship.^[52]

"Eastern", then, indicates the geographical element in the church's origin and development, while "Orthodox" indicates the faith, as well as communion with the Ecumenical Patriarchate of Constantinople.^[53] There are additional Christian churches in the east that are in communion with neither the Catholic Church nor the Eastern Orthodox Church, who tend to be distinguished by the category named "Oriental Orthodox". While the Eastern Orthodox Church continues officially to call itself "Catholic", for reasons of universality, the common title of "Eastern Orthodox Church" avoids casual confusion with the Catholic Church.

Orthodoxy

The first known use of the phrase "the catholic Church" (he katholike ekklesia) occurred in a letter written about AD 110 from one Greek church to another (Ignatius of Antioch to the Smyrnaeans). The letter states: "Wheresoever the bishop shall appear, there let the people be, even as where Jesus may be, there is the universal [katholike] Church."^[54] Thus, almost from the beginning, Christians referred to the Christian Church as the "one, holy, catholic (from the Greek καθολική, 'according to the whole, universal'^[55]) and apostolic Church".^[22] The Eastern Orthodox Church claims that it is today the continuation and preservation of that same early church.

A number of other Christian churches also make a similar claim: the Roman Catholic Church, the Anglican Communion, the Assyrian Church, and the Oriental Orthodox. In the Eastern Orthodox view, the Assyrians and Orientals left the Orthodox Church in the years following the Third Ecumenical Council of Ephesus (431) and the Fourth Ecumenical Council of Chalcedon (451), respectively, in their refusal to accept those councils' Christological definitions. Similarly, the churches in Rome and Constantinople separated in an event known as the East–West Schism, traditionally dated to the year 1054, although it was more a gradual process than a sudden break.

To all these churches, the claim to catholicity (universality, oneness with the ancient Church) is important for multiple doctrinal reasons that have more bearing internally in each church than in their relation to the others, now separated in faith. The meaning of holding to a faith that is true is the primary reason why anyone's statement of which church split off from which other has any significance at all; the issues go as deep as the schisms. The depth of this meaning in the Eastern Orthodox Church is registered first in its use of the word "Orthodox" itself, a union of Greek orthos ("straight", "correct", "true", "right") and doxa ("common belief", from the ancient verb δοκέω-δοκῶ which is translated "to believe", "to think", "to consider", "to imagine", "to assume").^[56]

The dual meanings of doxa, with "glory" or "glorification" (of God by the church and of the church by God), especially in worship, yield the pair "correct belief" and "true worship". Together, these express the core of a fundamental teaching about the inseparability of belief and worship and their role in drawing the church together with Christ.^[57]^[58] All Slavic churches use the title Pravoslavie (Cyrillic: Православие), meaning "correctness of glorification", to denote what is in English Orthodoxy, while the Georgians use the title Martlmadidebeli.

The term "Eastern Church" (the geographic east in the East–West Schism) has been used to distinguish it from western Christendom (the geographic West, which at first came to designate the Catholic communion, later also the various Protestant and Anglican branches). "Eastern" is used to indicate that the highest concentrations of the Eastern Orthodox Church presence remain in the eastern part of the Christian world, although it is growing worldwide. Orthodox Christians throughout the world use various ethnic or national jurisdictional titles, or more inclusively, the title "Eastern Orthodox", "Orthodox Catholic", or simply "Orthodox".^[53]

What unites Orthodox Christians is the catholic faith as carried through holy tradition. That faith is expressed most fundamentally in scripture and worship,^[59] and the latter most essentially through baptism and in the Divine Liturgy.^[60]

The lines of even this test can blur, however, when differences that arise are not due to doctrine, but to recognition of jurisdiction. As the Eastern Orthodox Church has spread into the west and over the world, the church as a whole has yet to sort out all the inter-jurisdictional issues that have arisen in the expansion, leaving some areas of doubt about what is proper church governance.^[61] Moreover, as in the ancient church persecutions, the aftermath of persecutions of Christians in communist nations has complicated some issues of governance that have yet to be completely resolved.^[62]

All members of the Eastern Orthodox Church profess the same faith, regardless of race or nationality, jurisdiction or local custom, or century of birth. Holy tradition encompasses the understandings and means by which that unity of faith is transmitted across boundaries of time, geography, and culture. It is a continuity that exists only inasmuch as it lives within Christians themselves.^[63] It is not static, nor an observation of rules, but rather a sharing of observations that spring both from within and also in keeping with others, even others who lived lives long past. The church proclaims the Holy Spirit maintains the unity and consistency of holy tradition to preserve the integrity of the faith within the church, as given in the scriptural promises.^[64]

Orthodoxy asserts that its shared beliefs, and its theology, exist within holy tradition and cannot be separated from it, and that their meaning is not expressed in mere words alone;^[65] that doctrine cannot be understood unless it is prayed;^[66] and that it must also be lived in order to be prayed, that without action, the prayer is idle, empty, and in vain, and therefore the theology of demons.^[67]

Catholicity

The Eastern Orthodox Church considers itself to be both orthodox and catholic.^[68] The doctrine of the Catholicity of the Church, as derived from the Nicene Creed, is essential to Eastern Orthodox ecclesiology. The term Catholicity of the Church (Greek Καθολικότης τῆς Ἐκκλησίας) is used in its original sense, as a designation for the universality of the Christian Church, centred around Christ. Therefore, the Eastern Orthodox notion of catholicity is not centred around any singular see, unlike the Catholic Church which has one earthly centre.

Due to the influence of the Catholic Church in the west, where the English language itself developed, the words "catholic" and "catholicity" are sometimes used to refer to that church specifically. However, the more prominent dictionary sense given for general use is still the one shared by other languages, implying breadth and universality, reflecting comprehensive scope.^[69] In a Christian context, the Christian Church, as identified with the original church founded by Christ and his apostles, is said to be catholic (or universal) in regard to its union with Christ in faith.^[70]

Just as Christ is indivisible, so are union with him and faith in him, whereby the Christian Church is "universal", unseparated, and comprehensive, including all who share that faith. Orthodox bishop Kallistos Ware has called that "simple Christianity".^[70] That is the sense of early and patristic usage wherein the church usually refers to itself as the "Catholic Church",^[71]^[72] whose faith is the "Orthodox faith". It is also the sense within the phrase "one, holy, catholic, and apostolic Church", found in the Nicene Creed, and referred to in Orthodox worship, e.g. in the litany of the catechumens in the Divine Liturgy.

With the mutual excommunications of the East–West Schism in 1054,^[73] the churches in Rome and Constantinople each viewed the other as having departed from the true church, leaving a smaller but still-catholic church in place. Each retained the "Catholic" part of its title, the "Roman Catholic Church" (or Catholic Church) on the one hand, and the "Orthodox Catholic Church" on the other, each of which was defined in terms of inter-communion with either Rome or Constantinople. While the Eastern Orthodox Church recognises what it shares in common with other churches, including the Catholic Church, it sees catholicity in terms of complete union in communion and faith, with the Church throughout all time, and the sharing remains incomplete when not shared fully.

History

Early Church

Paul and the Apostles travelled extensively throughout the Roman Empire, including Asia Minor, establishing churches in major communities, with the first churches appearing in Jerusalem and the Holy Land, then in Antioch, Ethiopia, Egypt, Rome, Alexandria, Athens, Thessalonica, Illyricum, and Byzantium, which centuries later would become prominent as the New Rome.^[74] Christianity encountered considerable resistance in the Roman Empire, mostly because its adherents refused to comply with the demands of the Roman state—often even when their lives were threatened—by offering sacrifices to the pagan gods. Despite persecution, skepticism, and initial social stigma, the Christian Church spread, particularly following the conversion of Emperor Constantine I in AD 312.^[74]

By the fourth century, Christianity was present in numerous regions well beyond the Levant. A number of influential schools of thought had arisen, particularly the Alexandrian and Antiochian philosophical approaches. Other groups, such as the Arians, had also managed to gain influence. However, their positions caused theological conflicts within the church, thus prompting the Emperor Constantine to call for a great ecumenical synod in order to define the church's position against the growing, often widely diverging, philosophical and theological interpretations of Christianity. He made it possible for this council to meet not only by providing a location, but by offering to pay for the transportation of all the existing bishops of the church. Most modern Christian churches regard this synod, commonly called the First Council of Nicaea or more generally the First Ecumenical Council,^[74]^[75] as of major importance.

Ecumenical councils

Several doctrinal disputes from the fourth century onwards led to the calling of ecumenical councils. In the Orthodox Church, an ecumenical council is the supreme authority that can be invoked to resolve contested issues of the faith. As such, these councils have been held to resolve the most important theological matters that came to be disputed within the Christian Church. Many lesser disagreements were resolved through local councils in the areas where they arose, before they grew significant enough to require an ecumenical council.

There are seven councils authoritatively recognised as ecumenical by the Eastern Orthodox Church:

The First Ecumenical Council was convoked by the Roman Emperor Constantine at Nicaea in 325 and presided over by the Patriarch Alexander of Alexandria, with over 300 bishops condemning the view of Arius that the Son is a created being inferior to the Father.^[76]
The Second Ecumenical Council was held at Constantinople in 381, presided over by the Patriarchs of Alexandria and Antioch, with 150 bishops, defining the nature of the Holy Spirit against those asserting His inequality with the other persons of the Trinity.^[77]
The Third Ecumenical Council is that of Ephesus in 431, presided over by the Patriarch of Alexandria, with 250 bishops, which affirmed that Mary is truly "Birthgiver" or "Mother" of God (Theotokos), contrary to the teachings of Nestorius.^[78]
The Fourth Ecumenical Council is that of Chalcedon in 451, Patriarch of Constantinople presiding, 500 bishops, affirmed that Jesus is truly God and truly man, without mixture of the two natures, contrary to Monophysite teaching.^[79]
The Fifth Ecumenical Council is the second of Constantinople in 553, interpreting the decrees of Chalcedon and further explaining the relationship of the two natures of Jesus; it also condemned the alleged teachings of Origen on the pre-existence of the soul, etc.^[80]
The Sixth Ecumenical Council is the third of Constantinople in 681; it declared that Christ has two wills of his two natures, human and divine, contrary to the teachings of the Monothelites.^[81]
The Seventh Ecumenical Council was called under the Empress Regent Irene of Athens in 787, known as the second of Nicaea. It supports the veneration of icons while forbidding their worship. It is often referred to as "The Triumph of Orthodoxy".^[82]

There are also two other councils which are considered ecumenical by some Eastern Orthodox:

The Fourth Council of Constantinople was called in 879. It restored Photius to his See in Constantinople and condemned any alteration of the Nicene-Constantinopolitan Creed of 381.
The Fifth Council of Constantinople was actually a series of councils held between 1341 and 1351. It affirmed the hesychastic theology of Gregory Palamas and condemned the philosopher Barlaam of Calabria.

Other major councils

In addition to these councils, there have been a number of other significant councils meant to further define the Eastern Orthodox position. They are the Synods of Constantinople, in 1484, 1583, 1755, 1819, and 1872, the Synod of Iași in 1642, and the Pan-Orthodox Synod of Jerusalem in 1672. Another council convened in June 2016 to discuss many modern phenomena, other Christian confessions, Eastern Orthodoxy's relation with other religions and fasting disciplines.^[83]

Roman/Byzantine Empire

Constantinople is generally considered to be the centre and the "cradle of Orthodox Christian civilisation".^[84]^[85] From the mid-5th century to the early 13th century, Constantinople was the largest and wealthiest city in Europe.^[86] Eastern Christian culture reached its golden age during the high point of the Byzantine Empire and continued to flourish in Ukraine and Russia, after the fall of Constantinople. Numerous autocephalous churches were established in Europe: Greece, Georgia, Ukraine, as well as in Russia and Asia.

In the 530s the Church of the Holy Wisdom (Hagia Sophia) was built in Constantinople under Emperor Justinian I.^[87] Beginning with subsequent Byzantine architecture, Hagia Sophia became the paradigmatic Orthodox church form and its architectural style was emulated by Ottoman mosques a thousand years later.^[88]^[89] Being the episcopal see of the ecumenical patriarch of Constantinople, it remained the world's largest cathedral for nearly a thousand years, until Seville Cathedral was completed in 1520. Hagia Sophia has been described as "holding a unique position in the Christian world",^[88] and architectural and cultural icon of Byzantine and Eastern Orthodox civilisation,^[90]^[91] and it is considered the epitome of Byzantine architecture^[92] and is said to have "changed the history of architecture".^[93]

Early schisms

There are the "Nestorian" churches resulted from the reaction of the Council of Ephesus (431), which are the earliest surviving Eastern Christian churches that keep the faith of only the first two ecumenical councils, i.e., the First Council of Nicaea (325) and the First Council of Constantinople (381) as legitimate. "Nestorian" is an outsider's term for a tradition that predated the influence of Nestorius, the origin of which might lie in certain sections of the School of Antioch or via Nestorius' teachers Theodore of Mopsuestia or Diodore of Tarsus. The modern incarnation of the "Nestorian Church" is commonly referred to as "the Assyrian Church" or fully as the Assyrian Church of the East.

The church in Egypt (Patriarchate of Alexandria) split into two groups following the Council of Chalcedon (451), over a dispute about the relation between the divine and human natures of Jesus. Eventually this led to each group anathematising the other. Those that remained in communion with the other patriarchs (by accepting the Council of Chalcedon) are known today as the Greek Orthodox Church of Alexandria, where the adjective "Greek" refers to their ties to the Greek-speaking culture of the Byzantine Empire.

Those who disagreed with the findings of the Council of Chalcedon were the majority in Egypt. Today they are known as the Coptic Orthodox Church, having maintained a separate patriarchate. The Coptic Orthodox Church is currently the largest Christian church in Egypt and in the whole Middle East. There was also a similar, albeit smaller scale, split in Syria (Patriarchate of Antioch), which resulted in the separation of the Syriac Orthodox Church from the Byzantine Patriarchate of Antioch.

Those who disagreed with the Council of Chalcedon are sometimes called "Oriental Orthodox" to distinguish them from the "Eastern Orthodox", who accepted the Council of Chalcedon. Oriental Orthodox are also sometimes referred to as "non-Chalcedonians", or "anti-Chalcedonians". The Oriental Orthodox Church denies that it is monophysite and prefers the term "miaphysite", to denote the "united" nature of Jesus (two natures united into one) consistent with Cyril's theology: "The term union ... signifies the concurrence in one reality of those things which are understood to be united" and "the Word who is ineffably united with it in a manner beyond all description" (Cyril of Alexandria, On the Unity of Christ). This is also defined in the Coptic liturgy, where it is mentioned "He made it [his humanity] one with his divinity without mingling, without confusion and without alteration", and "His divinity parted not from his humanity for a single moment nor a twinkling of an eye."^[94] They do not accept the teachings of Eutyches, or Eutychianism.^[95]^[96] Both the Eastern Orthodox and Oriental Orthodox churches formally believe themselves to be the continuation of the true church.

Conversion of the South and East Slavs

In the ninth and tenth centuries, Christianity made great inroads into pagan Europe, including Bulgaria (864) and later Kievan Rus' (988). This work was made possible by Cyril and Methodius of Thessaloniki, two brothers chosen by Byzantine emperor Michael III to fulfil the request of Rastislav of Moravia for teachers who could minister to the Moravians in their own language. Cyril and Methodius began translating the divine liturgy, other liturgical texts, and the Gospels along with some other scriptural texts into local languages; with time, as these translations were copied by speakers of other dialects, the hybrid literary language Church Slavonic was created. Originally sent to convert the Slavs of Great Moravia, Cyril and Methodius were forced to compete with Frankish missionaries from the Roman diocese; their disciples were driven out of Great Moravia in AD 886 and emigrated to Bulgaria.^[97]

After the Christianisation of Bulgaria in 864, the disciples of Cyril and Methodius in Bulgaria, the most important being Clement of Ohrid and Naum of Preslav, were of great importance to the Orthodox faith in the First Bulgarian Empire. In a short time they managed to prepare and instruct the future Bulgarian clergy into the biblical texts and in AD 870 the Fourth Council of Constantinople granted the Bulgarians the oldest organised autocephalous Slavic Orthodox Church, which shortly thereafter became Patriarchate. The success of the conversion of the Bulgarians facilitated the conversion of the East Slavs.^[98]^{[failed verification]} A major event in this effort was the development of the Cyrillic script in Bulgaria, at the Preslav Literary School in the ninth century; this script, along with the liturgical Old Church Slavonic, also called Old Bulgarian, was declared official in Bulgaria in 893.^[99]^[100]^[101]

The work of Cyril and Methodius and their disciples had a major impact on the Serbs as well.^[102]^[103]^[104]^[105]^[106]^[107]^[108]^[109] They accepted Christianity collectively along familial and tribal lines, a gradual process that occurred between the seventh and ninth centuries. In commemoration of their baptisms, each Serbian family or tribe began to celebrate an exclusively Serbian custom called Slava (patron saint) in a special way to honour the saint on whose day they received the sacrament of baptism. It is the most solemn day of the year for all Serbs of the Orthodox faith and has played a role of vital importance in the history of the Serbian people. Slava remains a celebration of the conversion of the Serbian people, which the church blessed and proclaimed a church institution.^[110]

The missionaries to the East and South Slavs had great success in part because they used the people's native language rather than Greek, the predominant language of the Byzantine Empire, or Latin, as the Roman priests did.^[102] Perhaps the greatest legacy of their efforts is the Russian Orthodox Church, which is the largest of the Orthodox churches.^[111]

Great Schism (1054)

In the 11th century, what was recognised as the Great Schism took place between Rome and Constantinople, which led to separation between the Church of the West, the Catholic Church, and the Eastern Byzantine churches, now the Orthodox.^[112] There were doctrinal issues like the filioque clause and the authority of the Roman Pope involved in the split, but these were greatly exacerbated by political factors of both Church and state, and by cultural and linguistic differences between Latins and Greeks. Regarding papal supremacy, the Eastern half grew disillusioned with the Pope's centralisation of power, as well as his blatant attempts of excluding the Eastern half in regard to papal approvals. It had previously been the case that the emperor would have a say when a new Pope was elected, but towards the high Middle Ages, the Christians in Rome were slowly consolidating power and removing Byzantine influence. However, even before this exclusionary tendency from the West, well before 1054, the Eastern and Western halves of the Church were in perpetual conflict, particularly during the periods of Eastern iconoclasm and the Photian schism.^[113]

Latin Crusaders sacking the city of Constantinople, the capital of the Eastern Orthodox controlled Byzantine Empire, in 1204

The final breach is often considered to have arisen after the capture and sacking of Constantinople by the Fourth Crusade in 1204; the final break with Rome occurred circa 1450. The sacking of Church of Holy Wisdom and establishment of the Latin Empire as a seeming attempt to supplant the Orthodox Byzantine Empire in 1204 is viewed with some rancour to the present day. In 2004, Pope John Paul II extended a formal apology for the sacking of Constantinople in 1204, which had also been strongly condemned by the Pope at the time, Innocent III; the apology was formally accepted by Patriarch Bartholomew of Constantinople. However, many items stolen during this time, such as holy relics and riches, are still held in various European cities, particularly Venice.^[114]^[115]

Reunion was attempted twice, at the 1274 Second Council of Lyon and the 1439 Council of Florence. The Council of Florence briefly reestablished communion between East and West, which lasted until after the fall of Constantinople in 1453. In each case, however, the councils were rejected by the Orthodox people as a whole, and the union of Florence also became very politically difficult after Constantinople came under Ottoman rule. However, in the time since, several local Orthodox Christian churches have renewed union with Rome, known as the Eastern Catholic Churches. Recent decades have seen a renewal of ecumenical spirit and dialogue between the Catholic and Orthodox churches.^[116]

Greek Church under Ottoman rule

The Byzantine Empire never fully recovered from the sack of Constantinople in 1204. Over the next two centuries, it entered a precipitous decline in both territory and influence. In 1453, a much-diminished Byzantine Empire fell to the Ottoman Empire, ending what was once the most powerful state in the Orthodox Christian world, if not in all Christendom. By this time Egypt, another major centre of Eastern Christianity, had been under Muslim control for some seven centuries; most Eastern Orthodox communities across southeastern Europe gradually came under Ottoman rule by the 16th century.

Under the Ottomans, the Greek Orthodox Church acquired substantial power as an autonomous millet. The ecumenical patriarch was the religious and administrative ruler of the Rûm, an Ottoman administrative unit meaning "Roman", which encompassed all Orthodox subjects of the Empire regardless of ethnicity. While legally subordinate to Muslims and subject to various restrictions, the Orthodox community was generally tolerated until the rise of nationalist movements in the late 19th and early 20th centuries, and left to govern its own internal affairs, both religiously and legally. Until the empire's dissolution in the early 20th century, Orthodox Christians would remain the largest non-Muslim minority, and at times among the wealthiest and most politically influential.

During the period 1914–1923 in Asia Minor (Anatolia) the Greek Genocide took place by the Ottomans as a result of the Greeks invading Turkey and the ensuing Greco-Turkish War (1919–1922). During the Greek Genocide, many Orthodox Christians were persecuted and killed. The culmination of the martyrdom was the Asia Minor Catastrophe with the killing of a large number of Orthodox. Among them, 347 clergymen of the Smyrna region and Metropolitan of Smyrna Chrysostomos were tortured and killed. The period 1923–1924 was followed by the obligatory population exchange between Greece and Turkey.^[117]

Russian Orthodox Church in the Russian Empire

By the time most Orthodox communities came under Muslim rule in the mid 15th century, Orthodoxy was very strong in Russia, which had maintained close cultural and political ties with the Byzantine Empire; roughly two decades after the fall of Constantinople, Ivan III of Russia married Sophia Palaiologina, a niece of the last Byzantine Emperor Constantine XI, and styled himself Tsar ("Caesar") or imperator. In 1547, his grandson Ivan IV, a devout Orthodox Christian, cemented the title as "Tsar of All Rus", establishing Russia's first centralised state with divinely appointed rulers. In 1589, the Patriarchate of Constantinople granted autocephalous status to Moscow, the capital of what was now the largest Orthodox Christian polity; the city thereafter referred to itself as the Third Rome —the cultural and religious heir of Constantinople.

Until 1666, when Patriarch Nikon was deposed by the tsar, the Russian Orthodox Church had been independent of the State.^[118] In 1721, the first Russian Emperor, Peter I, abolished completely the patriarchate and effectively made the church a department of the government, ruled by a most holy synod composed of senior bishops and lay bureaucrats appointed by the Emperor himself. Over time, Imperial Russia would style itself a protector and patron of all Orthodox Christians, especially those within the Ottoman Empire.^[119]

For nearly 200 years, until the Bolsheviks' October Revolution of 1917, the Russian Orthodox Church remained, in effect, a governmental agency and an instrument of tsarist rule. It was used to varying degrees in imperial campaigns of Russification, and was even allowed to levy taxes on peasants. The church's close ties with the state came to a head under Nicholas I (1825–1855), who explicitly made Orthodoxy a core doctrine of imperial unity and legitimacy. The Orthodox faith became further tied to Russian identity and nationalism, while the church was further subordinated to the interests of the state. Consequently, Russian Orthodox Church, along with the imperial regime to which it belonged, came to be presented as an enemy of the people by the Bolsheviks and other Russian revolutionaries.^[120]

Eastern Orthodox churches under Communist rule

1931 demolition of the Cathedral of Christ the Saviour in Moscow

The rebuilt Cathedral of Christ the Saviour, currently the second tallest Orthodox church

After the October Revolution of 1917, part of the clergy of the Russian Orthodox Church fled abroad to escape Bolshevik persecutions, founding an independent church in exile, which reunified with its Russian counterpart in 2007.^[121] Some actions against Orthodox priests and believers along with execution included torture, being sent to prison camps, labour camps or mental hospitals.^[122]^[123] In the first five years after the Bolshevik revolution, 28 bishops and 1,200 priests were executed.^[124]

After Nazi Germany's attack on the Soviet Union in 1941, Joseph Stalin revived the Russian Orthodox Church to intensify patriotic support for the war effort. By 1957 about 22,000 Russian Orthodox churches had become active. However, in 1959, Nikita Khrushchev initiated his own campaign against the Russian Orthodox Church and forced the closure of about 12,000 churches. It is estimated that 50,000 clergy had been executed between the revolution and the end of the Khrushchev era. Members of the church hierarchy were jailed or forced out, their places taken by docile clergy, many of whom had ties with the KGB. By 1985 fewer than 7,000 churches remained active.^[124]

Albania was the only state to have declared itself officially fully atheist.^[125] In some other Communist states such as Romania, the Romanian Orthodox Church as an organisation enjoyed relative freedom and even prospered, albeit under strict secret police control. That, however, did not rule out demolishing churches and monasteries as part of broader systematisation (urban planning), and state persecution of individual believers. As an example of the latter, Romania stands out as a country which ran a specialised institution where many Orthodox (along with people of other faiths) were subjected to psychological punishment or torture and mind control experimentation in order to force them give up their religious convictions. However, this was only supported by one faction within the regime, and lasted only three years. The Communist authorities closed down the prison in 1952, and punished many of those responsible for abuses (twenty of them were sentenced to death).^[126]^[127]

Post-Communism to 21st century

Since the dissolution of the Soviet Union, and the subsequent Fall of Communist governments across the Orthodox world, there has been marked growth in Christian Orthodoxy, particularly in Russia. According to the Pew Research Religion & Public Life Project, between 1991 and 2008, the share of Russian adults identifying as Orthodox Christian rose from 31 per cent to 72 per cent, based on analysis of three waves of data (1991, 1998 and 2008) from the International Social Survey Programme (ISSP), a collaborative effort involving social scientists in about 50 countries.^[128]

Pew research conducted in 2017 found a doubling in the global Orthodox population since the early 20th century, with the greatest resurgence in Russia.^[129] In the former Soviet Union—where the largest Orthodox communities live—self-identified Orthodox Christians generally report low levels of observance and piety: In Russia, only 6% of Orthodox Christian adults reported attending church at least weekly, 15% say religion is "very important" in their lives, and 18% say they pray daily; other former Soviet republics display similarly low levels of religious observance.^[130]

Moscow–Constantinople schisms

1996

Since 1923, the Orthodox Church of Estonia separated from the Russian Orthodox Church due to the imprisonment of Patriarch Tikhon of Moscow, and the church in the Republic of Estonia falling out of communication with the Russian Church. They petitioned to be placed under direct control of the Ecumenical Patriarch of Constantinople, operating as an autonomous church. In 1944 the Soviet Union annexed Estonia and outlawed the Orthodox Church of Estonia, forcefully bringing their churches back under the control of the Moscow Patriarch. However, the church's Primate, Metropolitan Aleksander, fled to Sweden with 21 clergymen and 8,000 followers and established a synod there operating there throughout the Cold War.^[131]

In 1993, the synod of the Orthodox Church of Estonia in Exile was re-registered and on 20 February 1996, Bartholomew I of Constantinople restored the church's position as subordinate to Constantinople, not Moscow. Patriarch Alexy II of Moscow, who had been born in Estonia, rejected this loss of territory, and severed ties with Patriarch Bartholomew on February 23, removing his name from the diptychs. The two sides would then negotiate in Zürich, and a settlement was reached on 16 May 1996. In it, the ethnically Estonian population of Estonia would be under the jurisdiction of the Estonian Apostolic Orthodox Church, while the ethnically Russian population of Estonia would be under the jurisdiction of the Estonian Orthodox Church of the Moscow Patriarchate. After signing the document the Russian Church restored communion with the Ecumenical Patriarchate.^[132]^[28]

2018

Since the Baptism of Rus'^{[note 1]} in 867 the Orthodox church in Ukraine was led by the Metropolitan of Kiev and all Rus' who was subordinate to the Ecumenical Patriarch of Constantinople and was largely governed by the Polish-Lithuanian Commonwealth since the territory was conquered in the Galicia–Volhynia Wars, ending in 1392. Poland-Lithuania lost the territory to Russia as part of the peace deal of the Great Northern War in 1654. In 1686 Dionysius IV of Constantinople transferred the territory to the Patriarch of Moscow and all Rus'. In 1924, Orthodox churches in Ukraine besides the Metropolitan of Kyiv were placed under the jurisdiction of the Polish Orthodox Church by the Ecumenical Patriarch as an autonomous church, however, the Russian Church never agreed to nor recognised this transfer, mostly due to Patriarch Tikhon of Moscow and most of the Russian Church's leaders being imprisoned by Soviet officials.^[133]^[134]^[135] The Soviet Union, initially, had a policy of repression against the Orthodox Church, regardless of its denomination. However, after the start of the Nazi Invasion of the Soviet Union, Joseph Stalin transformed the Russian Church into a propaganda tool to intensify patriotic support for the war effort. Following Soviet victory in the war, various autonomous and Independent Orthodox churches around eastern Europe were forcefully integrated or reintegrated into the Russian Church, including the church in Ukraine. Many of the church's leaders at this time were installed and closely monitored by the NKVD to ensure the church's support for the Soviet Union.^[136]^[137]^[138]

This situation led to the rise of rival, anti-Russian and anti-Soviet churches within Ukraine, including the Ukrainian Autocephalous Orthodox Church (UAOC), founded in 1917 which declared itself the restored autonomous church that existed prior to 1686 but had been eradicated within Soviet Ukraine by the 1930s. The church was largely supported by Ukrainian émigrés and diaspora, and was restored as a legally recognised church by the Ukrainian government in 1991.^[139] In 1992, the Ukrainian Orthodox Church – Kyiv Patriarchate (UOC-KP) came into existence, being founded by members of the Russian Church defrocked for insubordination, alongside support with the Ukrainian émigré community. The church submitted a request for Ukrainian autocephaly at its founding synod in Kyiv in 1992.^[140]^[141] These churches were competing with the Ukrainian Orthodox Church (UOC-MP), the Russian Church in Ukraine.^[142]^[143]

On 11 October 2018, the Holy Synod of the Ecumenical Patriarchate of Constantinople revoked the Russian Church's letter of issue, allowing them to ordain the Metropolitan of Kyiv, re-established a stauropegion in Kyiv, and lifted the Russian Church's excommunication of members of the UAOC and the UOC-KP. In response, on 15 October, the Holy Synod of the Russian Orthodox Church severed all ties with the Ecumenical Patriarchate of Constantinople and barred all members of the Russian Church from receiving communion or sacraments from any churches with ties to the Ecumenical Patriarchate.^[144]^[145] On 15 December 2018, the UAOC and UOC-KP voted to merge in the Unification council of the Eastern Orthodox churches of Ukraine, forming the restored Orthodox Church of Ukraine, with Epiphanius I of Ukraine, of the UOC-KP, becoming the first primate of the unified church.^[146] On 5 January 2019, Bartholomew I signed the official tomos that granted autocephaly to the Orthodox Church of Ukraine.^[147]

In addition to severing ties with the Ecumenical Patriarchate, the Russian Church has also severed communion with Archbishop Ieronymos II of Athens primate of the Church of Greece,^[148]^[149]^[150] Patriarch Theodore II of Alexandria,^[151]^[152]^[153]^[154] and Archbishop Chrysostomos II of Cyprus.^[155]^[156]^[157]^[158] In response to the severing of ties with the Ecumenical Patriarchate, the Archdiocese of Russian Orthodox Churches in Western Europe (AROCWE), voted to dissolve itself, although the vote failed, it resulted in a split in AROCWE, with several churches leaving to form the "Vicariate of Russian Tradition of the Metropolis of France", while John (Renneteau) [ru], head of the AROCWE, personally joined the Russian Church.^[159]^[160]^[161]^[162]^[163] Additionally, during the Russian invasion of Ukraine, the UOC-MP severed all ties with the Russian Church.^[164]^[165]^[166]

Organisation and leadership

Orthodox church in La Coruña, Galicia, (Spain).

The Eastern Orthodox Church is a fellowship of autocephalous (Ancient Greek: αὐτοκέφαλος; "self-headed") churches, with the ecumenical patriarch of Constantinople recognised as having primus inter pares status. The patriarch of Constantinople has the honour of primacy, but his title is only first among equals and he has no real authority over churches other than the Constantinopolitan church. Rather, his role is limited to defined prerogatives interpreted by the ecumenical patriarch.^[167]^[168]^[169]^[170] At times, though, the office of the ecumenical patriarch has been accused of Constantinopolitan or Eastern papism.^[171]^[172]^[173]

The Eastern Orthodox Church considers Jesus Christ to be the head of the Church and the Church to be his body. It is believed that Church authority and the grace of God is directly passed down to Orthodox bishops and other clergy through the laying on of hands—a practice started by the New Testament apostles—and that this unbroken historical link is an essential element of the true church (Acts 8:17; 1 Timothy 4:14; Hebrews 6:2) The Eastern Orthodox Church asserts that apostolic succession requires apostolic faith, and bishops without apostolic faith, who are in heresy, forfeit their claim to apostolic succession.^[174] Orthodox churches differentiate themselves from other Christian churches by practising "ritual and liturgy... rich in mystery and symbolism,"^[175] similar to their views on the sacraments.

The Eastern Orthodox communion is organised into several regional churches, which are either autocephalous or lower-ranking autonomous ("self-governing") church bodies unified in theology and worship. These include the fourteen autocephalous churches of the Constantinople, Alexandria, Antioch, Jerusalem, Georgia, Cyprus, Bulgaria, Serbia, Russia, Greece, Poland, Romania, Albania, and the Czech Republic and Slovakia, which were officially invited to the Pan-Orthodox Council of 2016;^[176] the Orthodox Church in America formed in 1970; the autocephalous Orthodox Church of Ukraine created in 2019; the Macedonian Orthodox Church – Ohrid Archbishopric, granted autocephaly by the Serbian Orthodox Church in 2022;^[177] and a number of autonomous churches.^[167] Each church has a ruling bishop and a holy synod to administer its jurisdiction and lead the Eastern Orthodox Church in the preservation and teaching of the apostolic and patristic traditions and church practices.

Each bishop has a territory (see) over which he governs.^[168] His main duty is to make sure the traditions and practices of the Eastern Orthodox Church are preserved. Bishops are equal in authority and cannot interfere in the jurisdiction of another bishop. Administratively, these bishops and their territories are organised into various autocephalous groups or synods of bishops who gather together at least twice each year to discuss the state of affairs within their respective sees. While bishops and their autocephalous synods have the ability to administer guidance in individual cases, their actions do not usually set precedents that affect the entire Eastern Orthodox Church. Bishops are almost always chosen from the monastic ranks and must remain unmarried.

Church councils

The ecumenical councils followed a democratic form, with each bishop having one vote. Though present and allowed to speak before the council, members of the Imperial Roman/Byzantine court, abbots, priests, deacons, monks and laymen were not allowed to vote. The primary goal of these great synods was to verify and confirm the fundamental beliefs of the Great Christian Church as truth, and to remove as heresy any false teachings that would threaten the Christian Church. The pope of Rome at that time held the position of primus inter pares ("first among equals") and, while he was not present at any of the councils, he continued to hold this title until the East–West Schism of 1054.^[178]^[179]^[180]^[181]

Other councils have helped to define the Eastern Orthodox position, specifically the Quinisext Council, the Synods of Constantinople, 879–880, 1341, 1347, 1351, 1583, 1819, and 1872, the Synod of Iași, 1642, and the Pan-Orthodox Synod of Jerusalem, 1672; the Pan-Orthodox Council, held in Greece in 2016, was the only such Eastern Orthodox council in modern times.

According to Eastern Orthodox teaching the position of "first among equals" gives no additional power or authority to the bishop that holds it, but rather that this person sits as organisational head of a council of equals (like a president).^[182]

One of the decisions made by the First Council of Constantinople (the second ecumenical council, meeting in 381) and supported by later such councils was that the Patriarch of Constantinople should be given equal honour to the Pope of Rome since Constantinople was considered to be the "New Rome". According to the third canon of the second ecumenical council: "Because [Constantinople] is new Rome, the bishop of Constantinople is to enjoy the privileges of honor after the bishop of Rome".^[183]

The 28th canon of the fourth ecumenical council clarified this point by stating: "For the Fathers rightly granted privileges to the throne of Old Rome because it was the royal city. And the One Hundred and Fifty most religious Bishops (i.e. the second ecumenical council in 381) actuated by the same consideration, gave equal privileges to the most holy throne of New Rome, justly judging that the city which is honoured with the Sovereignty and the Senate, and enjoys equal privileges with the old imperial Rome, should in ecclesiastical matters also be magnified as she is."^[184]

Because of the schism, the Eastern Orthodox no longer recognise the primacy of the pope of Rome. The patriarch of Constantinople therefore, like the Pope before him, now enjoys the title of "first among equals".

Adherents

The most reliable estimates currently available number Eastern Orthodox adherents at around 220 million worldwide,^[185] making Eastern Orthodoxy the second largest Christian communion in the world after the Catholic Church.^[186]^[b]

According to the 2015 Yearbook of International Religious Demography, as of 2010, the Eastern Orthodox population was 4% of the global population, declining from 7.1% in 1910. The study also found a decrease in proportional terms, with Eastern Orthodox Christians making up 12.2% of the world's total Christian population in 2015 compared to 20.4% a century earlier.^[188] A 2017 report by the Pew Research Center reached similar figures, noting that Eastern Orthodoxy has seen slower growth and less geographic spread than Catholicism and Protestantism, which were driven by colonialism and missionary activity across the world.^[189]

Over two-thirds of all Eastern Orthodox members are concentrated in Southeast Europe, Eastern Europe and Russia,^[190] with significant minorities in Central Asia and the Levant. However, Eastern Orthodoxy has become more globalised over the last century, seeing greater growth in Western Europe, the Americas, and parts of Africa; churches are present in the major cities of most countries.^[191] Adherents constitute the largest single religious community in Russia^[192]^[c]—which is home to roughly half the world's Eastern Orthodox Christians—and are the majority in Ukraine,^[194]^[195] Romania,^[194] Belarus,^[196] Greece,^[d]^[194] Serbia,^[194] Bulgaria,^[194] Moldova,^[194] Georgia,^[194] North Macedonia,^[194] Cyprus,^[194] and Montenegro;^[194] communities also dominate the disputed territories of Abkhazia, South Ossetia and Transnistria. Significant Eastern Orthodox minorities exist in Bosnia and Herzegovina,^[e]^[194] Latvia,^[197] Estonia,^[198] Kazakhstan,^[199] Kyrgyzstan,^[200] Lebanon,^[201] Albania, Syria,^[194] and many other countries.

Eastern Orthodox Christianity is the fastest growing religion in certain Western countries, primarily through labour migration from Eastern Europe, and to a lesser degree conversion.^[202] Ireland saw a doubling of its Eastern Orthodox population between 2006 and 2011.^[202]^[203]^[204] Spain and Germany have the largest communities in Western Europe, at roughly 1.5 million each, followed by Italy with around 900,000 and France with between 500,000 and 700,000.

In the Americas, four countries have over 100,000 Eastern Orthodox Christians: Canada, Mexico, Brazil, and the United States; all but the latter had fewer than 20,000 at the turn of the 20th century.^[205] The U.S. has seen its community more than quadruple since 1910, from 460,000 to 1.8 million as of 2017;^[205] consequently, the number of Eastern Orthodox parishes has been growing, with a 16% increase between 2000 and 2010.^[206]^[f]^[g]

Turkey, which for centuries once had one of the largest Eastern Orthodox communities, saw its overall Christian population fall from roughly one-fifth in 1914 to 2.5% in 1927.^[210] This was predominantly due to the dissolution of the Ottoman Empire, which saw most Christian territories become independent nations. The remaining Christian population was reduced further by large-scale genocides against the Armenian, Greek, Assyrian communities; subsequent population exchanges between Greece and Turkey^[211] and Bulgaria and Turkey; and associated emigration of Christians to foreign countries (mostly in Europe and the Americas).^[212] Today, only 0.2% of Turkey's population represent either Jews or various Christian denominations (320,000).^[213]^[194]

Theology

Trinity

Eastern Orthodox Christians believe in the Trinity, three distinct, divine persons (hypostases), without overlap or modality among them, who each have the same divine essence (ousia, Greek: οὐσία)—uncreated, immaterial, and eternal.^[214] These three persons are typically distinguished by their relation to each other. The Father is eternal and not begotten and does not proceed from any, the Son is eternal and begotten of the Father, and the Holy Spirit is eternal and proceeds from the Father.^[215] Orthodox doctrine regarding the Trinity is summarised in the Nicene Creed.^[216]

Eastern Orthodox Christians believe in a monotheistic conception of God (God is only one), which is both transcendent (wholly independent of, and removed from, the material universe) and immanent (involved in the material universe).^[215]

In discussing God's relationship to his creation, Eastern Orthodox theology distinguishes between God's eternal essence, which is totally transcendent, and his uncreated energies, which is how he reaches humanity.^[215] The God who is transcendent and the God who touches mankind are one and the same.^[215] That is, these energies are not something that proceed from God or that God produces, but rather they are God himself: distinct, yet inseparable from God's inner being.^[217] This view is often called Palamism.

In understanding the Trinity as "one God in three persons", "three persons" is not to be emphasised more than "one God", and vice versa. While the three persons are distinct, they are united in one divine essence, and their oneness is expressed in community and action so completely that they cannot be considered separately. For example, their salvation of mankind is an activity engaged in common: "Christ became man by the good will of the Father and by the cooperation of the Holy Spirit. Christ sends the Holy Spirit who proceeds from the Father, and the Holy Spirit forms Christ in our hearts, and thus God the Father is glorified." Their "communion of essence" is "indivisible". Trinitarian terminology—essence, hypostasis, etc.—are used "philosophically", "to answer the ideas of the heretics", and "to place the terms where they separate error and truth."^[218] The words do what they can do, but the nature of the Trinity in its fullness is believed to remain beyond man's comprehension and expression, a holy mystery that can only be experienced.

Sin, salvation, and the incarnation

When Eastern Orthodox Christians refer to fallen nature they are not saying that human nature has become evil in itself. Human nature is still formed in the image of God; humans are still God's creation, and God has never created anything evil, but fallen nature remains open to evil intents and actions. It is sometimes said among Eastern Orthodox that humans are "inclined to sin"; that is, people find some sinful things attractive. It is the nature of temptation to make sinful things seem the more attractive, and it is the fallen nature of humans that seeks or succumbs to the attraction. Orthodox Christians reject the Augustinian position that the descendants of Adam and Eve are actually guilty of the original sin of their ancestors.^[219]

Since the fall of man, then, it has been mankind's dilemma that no human can restore his nature to union with God's grace; it was necessary for God to effect another change in human nature. Eastern Orthodox Christians believe that Christ Jesus was both God and Man absolutely and completely, having two natures indivisibly: eternally begotten of the Father in his divinity, he was born in his humanity of a woman, Mary, by her consent, through descent of the Holy Spirit. He lived on earth, in time and history, as a man. As a man he also died, and went to the place of the dead, which is Hades. But being God, neither death nor Hades could contain him, and he rose to life again, in his humanity, by the power of the Holy Spirit, thus destroying the power of Hades and of death itself.^[220]

Through Christ's destruction of Hades' power to hold humanity hostage, he made the path to salvation effective for all the righteous who had died from the beginning of time—saving many, including Adam and Eve, who are remembered in the church as saints.^[221]

Resurrection of Christ

The Eastern Orthodox Church understands the death and resurrection of Jesus to be real historical events, as described in the gospels of the New Testament.

Christian life

Church teaching is that Eastern Orthodox Christians, through baptism, enter a new life of salvation through repentance whose purpose is to share in the life of God through the work of the Holy Spirit. The Eastern Orthodox Christian life is a spiritual pilgrimage in which each person, through the imitation of Christ and hesychasm,^[222] cultivates the practice of unceasing prayer. Each life occurs within the life of the church as a member of the body of Christ.^[223] It is then through the fire of God's love in the action of the Holy Spirit that each member becomes more holy, more wholly unified with Christ, starting in this life and continuing in the next.^[224]^[225] The church teaches that everyone, being born in God's image, is called to theosis, fulfilment of the image in likeness to God. God the creator, having divinity by nature, offers each person participation in divinity by cooperatively accepting His gift of grace.^[226]

The Eastern Orthodox Church, in understanding itself to be the Body of Christ, and similarly in understanding the Christian life to lead to the unification in Christ of all members of his body, views the church as embracing all Christ's members, those now living on earth, and also all those through the ages who have passed on to the heavenly life. "In general," Eastern Orthodox Christianity sees the Church "as a purely mystical body, the understanding of which cannot be attained through the development of a rational or natural theology."^[175]

The church includes the Christian saints from all times, and also judges, prophets and righteous Jews of the first covenant, Adam and Eve, even the angels and heavenly hosts.^[227] In Eastern Orthodox services, the earthly members together with the heavenly members worship God as one community in Christ, in a union that transcends time and space and joins heaven to earth. This unity of the church is sometimes called the communion of the saints.^[228]

Eastern Orthodox Order of Saint Benedict

The Order of Saint Benedict is an affiliation of monastics of the Eastern Orthodox Church who strive to live according to the Rule of St Benedict. The equivalent monastic order in the Catholic Church is known as the Order of Saint Benedict, abbreviated as OSB.

Within the United States, the Antiochian Orthodox Archdiocese of North America has at least one Benedictine monastery.^[229]

Several Benedictine monastic houses, sketes and hermitages fit within the Russian Orthodox Church outside of Russia, all of which are stavropegial directly under the Metropolitan. An oblate programme exists for Orthodox laity Saint Benedict Russian Orthodox Church in Oklahoma City, Oklahoma.^[230]

Virgin Mary and other saints

The Theotokos of Vladimir, one of the most venerated of Orthodox Christian icons of the Virgin Mary

The Eastern Orthodox Church believes death and the separation of body and soul to be unnatural—a result of the Fall of Man. They also hold that the congregation of the church comprises both the living and the dead. All persons currently in heaven are considered to be saints, whether their names are known or not. There are, however, those saints of distinction whom God has revealed as particularly good examples. When a saint is revealed and ultimately recognised by a large portion of the church a service of official recognition (glorification) is celebrated.^[231]

This does not "make" the person a saint; it merely recognises the fact and announces it to the rest of the church. A day is prescribed for the saint's celebration, hymns composed and icons created. Numerous saints are celebrated on each day of the year. They are venerated (shown great respect and love) but not worshipped, for worship is due God alone (this view is also held by the Oriental Orthodox and Catholic churches). In showing the saints this love and requesting their prayers, the Eastern Orthodox manifest their belief that the saints thus assist in the process of salvation for others.

Pre-eminent among the saints is the Virgin Mary (commonly referred to as Theotokos or Bogoroditsa: "Mother of God"). In Eastern Orthodox theology, the Mother of God is the fulfilment of the Old Testament archetypes revealed in the Ark of the Covenant (because she carried the New Covenant in the person of Christ) and the burning bush that appeared before Moses (symbolising the Mother of God's carrying of God without being consumed).^[232]

The Eastern Orthodox believe that Christ, from the moment of his conception, was both fully God and fully human. Mary is thus called the Theotokos or Bogoroditsa as an affirmation of the divinity of the one to whom she gave birth. It is also believed that her virginity was not compromised in conceiving God-incarnate, that she was not harmed and that she remained forever a virgin. Scriptural references to "brothers" of Christ are interpreted as kin, given that the word "brother" was used in multiple ways, as was the term "father". Due to her unique place in salvation history, Mary is honoured above all other saints and especially venerated for the great work that God accomplished through her.^[233]

The Eastern Orthodox Church regards the bodies of all saints as holy, made such by participation in the holy mysteries, especially the communion of Christ's holy body and blood, and by the indwelling of the Holy Spirit within the church. Indeed, that persons and physical things can be made holy is a cornerstone of the doctrine of the Incarnation, made manifest also directly by God in Old Testament times through his dwelling in the Ark of the Covenant. Thus, physical items connected with saints are also regarded as holy, through their participation in the earthly works of those saints. According to church teaching and tradition, God himself bears witness to this holiness of saints' relics through the many miracles connected with them that have been reported throughout history since biblical times, often including healing from disease and injury.^[234]

Eschatology

Orthodox Christians believe that when a person dies the soul is temporarily separated from the body. Though it may linger for a short period on Earth, it is ultimately escorted either to paradise (Abraham's bosom) or the darkness of Hades, following the Temporary Judgment. Orthodox do not accept the doctrine of Purgatory, which is held by Catholicism. The soul's experience of either of these states is only a "foretaste"—being experienced only by the soul—until the Final Judgment, when the soul and body will be reunited.^[235]^[236]

The Eastern Orthodox believe that the state of the soul in Hades can be affected by the love and prayers of the righteous up until the Last Judgment.^[237] For this reason the Church offers a special prayer for the dead on the third day, ninth day, fortieth day, and the one-year anniversary after the death of an Orthodox Christian. There are also several days throughout the year that are set aside for general commemoration of the departed, sometimes including nonbelievers. These days usually fall on a Saturday, since it was on a Saturday that Christ lay in the Tomb.^[236]

The Eastern Orthodox believe that after the Final Judgment:

All souls will be reunited with their resurrected bodies.
All souls will fully experience their spiritual state.
Having been perfected, the saints will forever progress towards a deeper and fuller love of God, which equates with eternal happiness.^[236]

Bible

The official Bible of the Eastern Orthodox Church contains the Septuagint text of the Old Testament, with the Book of Daniel given in the translation by Theodotion. The Patriarchal Text is used for the New Testament.^[238]^[239] Orthodox Christians hold that the Bible is a verbal icon of Christ, as proclaimed by the 7th ecumenical council.^[240] They refer to the Bible as holy scripture, meaning writings containing the foundational truths of the Christian faith as revealed by Christ and the Holy Spirit to its divinely inspired human authors. Holy scripture forms the primary and authoritative written witness of holy tradition and is essential as the basis for all Orthodox teaching and belief.^[241]

Once established as holy scripture, there has never been any question that the Eastern Orthodox Church holds the full list of books to be venerable and beneficial for reading and study,^[242] even though it informally holds some books in higher esteem than others, the four gospels highest of all. Of the subgroups significant enough to be named, the "Anagignoskomena" (ἀναγιγνωσκόμενα, "things that are read") comprises ten of the Old Testament books rejected in the Protestant canon,^[243] but deemed by the Eastern Orthodox worthy to be read in worship services, even though they carry a lesser esteem than the 39 books of the Hebrew canon.^[244] The lowest tier contains the remaining books not accepted by either Protestants or Catholics, among them, Psalm 151. Though it is a psalm, and is in the book of psalms, it is not classified as being within the Psalter (the first 150 psalms).^[245]

In a very strict sense, it is not entirely orthodox to call the holy scripture the "Word of God". That is a title the Eastern Orthodox Church reserves for Christ, as supported in the scriptures themselves, most explicitly in the first chapter of the Gospel of John. God's Word is not hollow, like human words. "God said, 'let there be light'; and there was light."^[246]

The Eastern Orthodox Church does not subscribe to the Protestant doctrine of sola scriptura. The church has defined what Scripture is; it also interprets what its meaning is.^[247] Christ promised: "When He, the Spirit of truth, has come, He will guide you into all truth".^[248]

Scriptures are understood to contain historical fact, poetry, idiom, metaphor, simile, moral fable, parable, prophecy and wisdom literature, and each bears its own consideration in its interpretation. While divinely inspired, the text still consists of words in human languages, arranged in humanly recognisable forms. The Eastern Orthodox Church does not oppose honest critical and historical study of the Bible.^[249]

Liturgy

Church calendar

Lesser cycles also run in tandem with the annual ones. A weekly cycle of days prescribes a specific focus for each day in addition to others that may be observed.^[250]

Each day of the Weekly Cycle is dedicated to certain special memorials. Sunday is dedicated to Christ's Resurrection; Monday honours the holy bodiless powers (angels, archangels, etc.); Tuesday is dedicated to the prophets and especially the greatest of the prophets, John the Forerunner and Baptist of the Lord; Wednesday is consecrated to the Cross and recalls Judas' betrayal; Thursday honours the holy apostles and hierarchs, especially Nicholas, Bishop of Myra in Lycia; Friday is also consecrated to the Cross and recalls the day of the Crucifixion; Saturday is dedicated to All Saints, especially the Mother of God, and to the memory of all those who have departed this life in the hope of resurrection and eternal life.

Church services

Music and chanting

The church has developed eight modes or tones (see Octoechos) within which a chant may be set, depending on the time of year, feast day, or other considerations of the Typikon. There are numerous versions and styles that are traditional and acceptable and these vary a great deal between cultures.^[251]

Traditions

Art and architecture

An illustration of the traditional interior of an Orthodox church

The Archdiocesan Cathedral of the Holy Trinity on New York City's Upper East Side is the largest Orthodox Christian church in the Western Hemisphere.^[252]

Local customs

Locality is also expressed in regional terms of churchly jurisdiction, which is often also drawn along national lines. Many Orthodox churches adopt a national title (e.g. Albanian Orthodox, Bulgarian Orthodox, Antiochian Orthodox, Georgian Orthodox, Greek Orthodox, Romanian Orthodox, Russian Orthodox, Serbian Orthodox, Ukrainian Orthodox, etc.) and this title can identify which language is used in services, which bishops preside, and which of the typica is followed by specific congregations. In the Middle East, Orthodox Christians are usually referred to as Rum ("Roman") Orthodox, because of their historical connection with the Eastern Roman (Byzantine) Empire.^[253]

Holy mysteries (sacraments)

The Byzantine Rite is used for the administration of the "Holy mysteries" or seven sacraments in Eastern Orthodox Christianity; among these are Holy Communion (the most direct connection), baptism, Chrismation, confession, unction, matrimony, and ordination, as well as blessings, exorcisms, and other occasions.^[254]

While the Catholic Church numbers seven sacraments, and many Protestant groups list two (baptism and the Eucharist) or even none, the Eastern Orthodox do not limit the number. However, for the sake of convenience, catechisms of the Eastern Orthodox Church will often speak of the "seven great mysteries". The term "sacrament" also properly applies to other sacred actions such as monastic tonsure or the blessing of holy water, and involves fasting, almsgiving, or an act as simple as lighting a candle, burning incense, praying or asking God's blessing on food.^[255]

Baptism

Baptism is the mystery which transforms the old and sinful person into a new and pure one; the old life, the sins, any mistakes made are gone and a clean slate is given. Through baptism a person is united to the Body of Christ by becoming a member of the Eastern Orthodox Church. During the service, water is blessed. The catechumen is fully immersed in the water three times in the name of the Trinity. This is considered to be a death of the "old man" by participation in the crucifixion and burial of Christ, and a rebirth into new life in Christ by participation in his resurrection.^[256]

Properly, the mystery of baptism is administered by bishops and priests; however, in emergencies any Eastern Orthodox Christian can baptise.^[257]

Chrismation

Chrismation (sometimes called confirmation) is the mystery by which a baptised person is granted the gift of the Holy Spirit through anointing with Holy Chrism.^[258]^[259] It is normally given immediately after baptism as part of the same service, but is also used to receive lapsed members of the Eastern Orthodox Church.^[260] As baptism is a person's participation in the death and resurrection of Christ, so Chrismation is a person's participation in the coming of the Holy Spirit at Pentecost.^[261]

A baptised and chrismated Eastern Orthodox Christian is a full member of the church and may receive the Eucharist regardless of age.^[261]

The creation of Chrism may be accomplished by any bishop at any time, but usually is done only once a year, often when a synod of bishops convenes for its annual meeting. Some autocephalous churches get their chrism from others. Anointing with it substitutes for the laying-on of hands described in the New Testament, even when an instrument such as a brush is used.^[262]

Holy Communion (Eucharist)

Holy Communion is given only to baptised and chrismated Eastern Orthodox Christians who have prepared by fasting, prayer and confession. The priest will administer the gifts with a spoon, called a "cochlear", directly into the recipient's mouth from the chalice.^[263] From baptism young infants and children are carried to the chalice to receive holy communion.^[261]

Marriage

From the Eastern Orthodox perspective, marriage is one of the holy mysteries or sacraments. As well as in many other Christian traditions, for example in Catholicism, it serves to unite a woman and a man in eternal union and love before God, with the purpose of following Christ and his Gospel and raising up a faithful, holy family through their holy union.^[264]^[265] The church understands marriage to be the union of one man and one woman, and certain Orthodox leaders have spoken out strongly in opposition to the civil institution of same-sex marriage.^[266]^[267]

Jesus said that "when they rise from the dead, they neither marry nor are given in marriage, but are like angels in heaven" (Mk 12:25). For the Orthodox Christian this passage should not be understood to imply that Christian marriage will not remain a reality in the Kingdom, but points to the fact that relations will not be "fleshy", but "spiritual".^[268] Love between wife and husband, as an icon of relationship between Christ and church, is eternal.^[268]

The church does recognise that there are rare occasions when it is better that couples do separate, but there is no official recognition of civil divorces. For the Eastern Orthodox, to say that marriage is indissoluble means that it should not be broken, the violation of such a union, perceived as holy, being an offence resulting from either adultery or the prolonged absence of one of the partners. Thus, permitting remarriage is an act of compassion of the church towards sinful man.^[269]

Holy orders

Eastern Orthodox subdeacon being ordained to the diaconate. The bishop has placed his omophorion and right hand on the head of the candidate and is reading the *Prayer of Cheirotonia*.

Widowed priests and deacons may not remarry and it is common for such members of the clergy to retire to a monastery (see clerical celibacy). This is also true of widowed wives of clergy, who do not remarry and become nuns when their children are grown. Only men are allowed to receive holy orders, although deaconesses had both liturgical and pastoral functions within the church.^[270]

In 2016, the Holy Synod of the Greek Orthodox Patriarchate of Alexandria voted to reinstate the female diaconate; in the following year, it ordained six sub-deaconesses in the Democratic Republic of Congo. In 2024 the Patriarchate ordained its first female deacon, Angelic Molen, in Zimbabwe, making her the first female deacon in the Eastern Orthodox Church.^[271]^[272]^[273] This move was met with criticism from other autocephalous Orthodox church leaders, such as the Antiochian Orthodox Christian Archdiocese of North America's Metropolitan Saba Esber,^[274] and Archpriest John Whiteford of the ROCOR,^[275] who criticized the move as being politically motivated and did not accurately reflect the historical use of deaconesses in the Eastern Orthodox Church.^[276]

Interfaith relations

The consecration of Reginald Heber Weller as an Anglican bishop at the Cathedral of St. Paul the Apostle in the Episcopal Diocese of Fond du Lac, with Anthony Kozlowski of the Polish National Catholic Church and Tikhon, then Bishop of the Aleutians and Alaska (along with his chaplains John Kochurov and Sebastian Dabovich) of the Russian Orthodox Church present

Relations with other Christians

In 1920, the Ecumenical Patriarchate of Constantinople, published an encyclical "addressed 'To all the Churches of Christ, wherever they may be', urging closer co-operation among separated Christians, and suggesting a 'League of Churches', parallel to the newly founded League of Nations".^[277] This gesture was instrumental in the foundation of the World Council of Churches (WCC);^[278] as such, almost all Eastern Orthodox churches are members of the WCC and "Orthodox ecclesiastics and theologians serve on its committees".^[279] Kallistos Ware, a British metropolitan bishop of the Orthodox Church, has stated that ecumenism "is important for Orthodoxy: it has helped to force the various Orthodox churches out of their comparative isolation, making them meet one another and enter into a living contact with non-Orthodox Christians."^[280]

Hilarion Alfeyev, then the Metropolitan of Volokolamsk and head of external relations for the Moscow Patriarchate of the Russian Orthodox Church, stated that Orthodox and Evangelical Protestant Christians share the same positions on "such issues as abortion, the family, and marriage" and desire "vigorous grassroots engagement" between the two Christian communions on such issues.^[281]

In that regard, the differences between the Catholic and Eastern Orthodox communions have not been improved in any relevant way. Dogmatic and liturgical polarities have been significant, even and especially in recent times. A pertinent point of contention between the monarchically papal, administratively centralised Catholic Church and the decentralised confederation of Orthodox churches is the theological significance of the Virgin Mary.^[282] During his visit to Georgia in October 2016, Pope Francis was snubbed by most Orthodox Christians as he led mass before a practically empty Mikheil Meskhi Stadium in Tbilisi.^[283]

The Oriental Orthodox Churches are not in communion with the Eastern Orthodox Church, despite their similar names. Slow dialogue towards restoring communion between the two churches began in the mid-20th century,^[284] and, notably, in the 19th century, when the Greek Patriarch in Egypt had to absent himself from the country for a long period of time; he left his church under the guidance of the Coptic Pope Cyril IV of Alexandria.^[285]

In 2019, the Primate of the OCU Metropolitan of Kyiv and All Ukraine Epiphanius stated that "theoretically" the Orthodox Church of Ukraine and the Ukrainian Greek Catholic Church could in the future unite into a united church around the Kyiv throne.^[286] In 2019, the Primate of the UGCC, Major Archbishop of Kyiv-Galicia Sviatoslav, stated that every effort should be made to restore the original unity of the Kyivan Church in its Orthodox and Catholic branches, saying that the restoration of Eucharistic communion between Rome and Constantinople is not a utopia.^[287]

Notwithstanding certain overtures by both Catholic and Eastern Orthodox leaders, the majority of Orthodox Christians, as well as Catholics, are not in favour of communion between their churches, with only a median of 35 per cent and 38 per cent, respectively, claiming support.^[130]

Relations with Islam

According to Bat Ye'or, Christians under Islamic rule were denied equality of rights since they were forced to pay the jizya poll tax.^[288]

In 2007, Metropolitan Alfeyev expressed the possibility of peaceful coexistence between Islam and Christianity in Russia, as the two religions have never had religious wars in Russia.^[289]

Constituencies

The various autocephalous and autonomous synods of the Eastern Orthodox Church are distinct in terms of administration and local culture, but for the most part exist in full communion with one another. In addition, some schismatic churches not in any communion exist, with all three groups identifying as Eastern Orthodox.

Another group of non-mainstream Eastern Orthodox Christians are referred True Orthodoxy or Old Calendarists; they are those who, without authority from their parent churches, have continued to use the old Julian calendar, and split from their parent church.

The Russian Orthodox Church Outside Russia (ROCOR) has united in 2007 with the Moscow Patriarchate; these two churches had separated from each other in the 1920s due to the subjection of the latter to the hostile Soviet regime.

Another group called the Old Believers, separated in 1666 from the official Russian Orthodox Church as a protest against church rite reforms introduced by Patriarch Nikon of Moscow.

Main communion

The Eastern Orthodox Church is a communion of 15 autocephalous—that is, administratively completely independent—regional churches,^[290] plus the Orthodox Church in America and two Ukrainian Orthodox Churches. The Orthodox Church in America is recognised as autocephalous only by the Russian, Bulgarian, Georgian, Polish and Czech-Slovak churches. In December 2018, representatives of two unrecognised Ukrainian Orthodox churches, along with two metropolitans of the recognised, but self-declared autocephalous Ukrainian Orthodox Church of the Moscow Patriarchate, proclaimed the formation of the unified Orthodox Church of Ukraine. On 5 January 2019, the Orthodox Church of Ukraine received its tomos of autocephaly (decree which defines the conditions of a church's independence) from the Ecumenical Patriarchate and thus received a place in the diptych.

Each church has defined geographical boundaries of its jurisdiction and is ruled by its council of bishops or synod presided by a senior bishop–its primate (or first hierarch). The primate may carry the honorary title of patriarch, metropolitan (in the Slavic tradition) or archbishop (in the Greek tradition).

Each regional church consists of constituent eparchies (or dioceses) ruled by a bishop. Some churches have given an eparchy or group of eparchies varying degrees of autonomy (self-government). Such autonomous churches maintain varying levels of dependence on their mother church, usually defined in a tomos or other document of autonomy.

Below is a list of the 15 autocephalous Orthodox churches forming the main body of Orthodox Christianity, all of which are titled equal to each other, but the Ecumenical Patriarchate is titled the first among equals. Based on the definitions, the list is in the order of precedence and alphabetical order where necessary, with some of their constituent autonomous churches and exarchates listed as well. The liturgical title of the primate is in italics.

Ecumenical Patriarchate of Constantinople (Archbishop of Constantinople-New Rome and First Among Equals Patriarch)
- Autonomous Orthodox Church of Finland (Archbishop of Helsinki and All Finland, formerly Archbishop of Karelia and All Finland)
- Self-governing Orthodox Church of Crete (Archbishop of Crete)
- Self-governing monastic community of Mount Athos
- Self-governing Orthodox Church of Korea (Metropolitan of Seoul and All Korea)
Greek Orthodox Patriarchate of Alexandria (the Pope and Patriarch of the Great City of Alexandria, Libya, Pentapolis, Ethiopia, all the land of Egypt, and all Africa)
Greek Orthodox Patriarchate of Antioch (Patriarch of Antioch and all the East)
Greek Orthodox Patriarchate of Jerusalem (Patriarch of the Holy City of Jerusalem and all Holy Land, Syria, Arabia, beyond the Jordan River, Cana of Galilee, and Sacred Zion)
- Autonomous Church of Mount Sinai (Archbishop of Choreb, Sinai, and Raitha)
Russian Orthodox Church (Patriarch of Moscow and all Russia)
- Autonomous Orthodox Church in Japan (Archbishop of Tokyo and Metropolitan of All Japan)
- Exarchate of Belarus (Metropolitan of Minsk and Slutsk, Patriarchal Exarch of All Belarus)
- Self-governing Russian Orthodox Church Outside Russia (Metropolitan of Eastern America and New York, First Hierarch of the Russian church abroad)
Serbian Orthodox Church (Archbishop of Peć, Metropolitan of Belgrade and Karlovci, and Serbian Patriarch)
Bulgarian Orthodox Church (Metropolitan of Sofia and Patriarch of All Bulgaria)
Romanian Orthodox Church (Archbishop of Bucharest, Metropolitan of Muntenia and Dobrudja, Locum Tenens of the Throne of Caesarea of Cappadocia, and Patriarch of Romania)
- Autonomous Romanian Orthodox Metropolis of the Americas (Romanian Orthodox Archbishop of the United States of America and Romanian Orthodox Metropolitan of the Americas)
Georgian Orthodox Church (Catholicos-Patriarch of All Georgia, the Archbishop of Mtskheta-Tbilisi and Metropolitan bishop of Abkhazia and Pitsunda)
Church of Cyprus (Archbishop of New Justiniana and all Cyprus)
Church of Greece (Archbishop of Athens and all Greece)
Albanian Orthodox Church (Archbishop of Tirana, Durres and all Albania)
Polish Orthodox Church (Metropolitan of Warsaw and all Poland or Archbishop of Warsaw and Metropolitan of All Poland)^[h]
Orthodox Church of the Czech Lands and Slovakia (Archbishop of Prague, the Metropolitan of Czech lands and Slovakia or the Archbishop of Presov, the Metropolitan of Czech lands and Slovakia)
Macedonian Orthodox Church – Ohrid Archbishopric (Metropolitan of Skopje and Archbishop of Ohrid and Macedonia and of Justiniana Prima)

Within the main body of Eastern Orthodoxy there are unresolved internal issues as to the autonomous or autocephalous status or legitimacy of the following Orthodox churches, particularly between those stemming from the Russian Orthodox or Constantinopolitan churches:

Orthodox Church in America (Archbishop of Washington, Metropolitan of All America and Canada) – Autocephaly not recognised by the Ecumenical Patriarchate.
Self-governing Estonian Apostolic Orthodox Church (Metropolitan of Tallinn and all Estonia) – Recognised only by the Ecumenical Patriarchate, opposed only by the Russian Orthodox Church.
Self-governing Estonian Orthodox Church of the Moscow Patriarchate (Metropolitan of Tallinn and all Estonia) – Not recognised by the Ecumenical Patriarchate.
Autonomous Bessarabian Orthodox Church in Moldova (Archbishop of Chișinău, Metropolitan of Bessarabia and Exarch of the Territories) of the Romanian Orthodox Church – Territory claimed by the Russian Orthodox Church.
Autonomous Moldovan Orthodox Church (Metropolitan of Chișinău and all Moldova) of the Russian Orthodox Church – Jurisdiction disputed by the Romanian Orthodox Church.
Orthodox Church of Ukraine (Metropolitan of Kyiv and All Ukraine) – Recognised by the Ecumenical Patriarchate, Church of Greece, Church of Cyprus, and Patriarchate of Alexandria^[292]^[293]^[294]^[295]^[296]^[297] as of October 2020, opposed by the Russian, Antiochian, Czech and Slovak, Serbian and Polish Orthodox Churches, and the Orthodox Church in America.^[298]^[299]^[300]
Ukrainian Orthodox Church (Moscow Patriarchate), self-governing by declaration which later was approved and recognised by the Georgian Orthodox Church^[301] – jurisdiction disputed with the Orthodox Church of Ukraine, which nearly all Churches continued to recognise as part of ROC.
Latvian Orthodox Church (Metropolitan of Riga and all Latvia) holding autocephaly prior to 1941, forcibly integrated in 1941 as a result of the Soviet occupation and annexation of the Baltic states to become a self-governing part of the Russian Orthodox Church, with the Ecumenical Patriarchate accepting this situation in 1978; in 2022, the Latvian Parliament (the Saeima) declared the restoration of autocephaly of the LOC from the ROC, due to security reasons.

Traditionalist groups

True Orthodox

True Orthodoxy has been separated from the mainstream communion over issues of ecumenism and calendar reform since the 1920s.^[302] The movement rejects the Ecumenical Patriarchate of Constantinople, the Moscow Patriarchate, and all churches which are in communion with them, accusing them of heresy and placing themselves under bishops who do the same thing. They adhere to the use of the Julian calendar, claiming that the calendar reform in the 1920s is in contradiction with the ecumenical councils. There is no official communion of True Orthodox; and they often are local groups and are limited to a specific bishop or locality.

Old calendarists

Old Believers

Old Believers are groups which do not accept the liturgical reforms which were carried out within the Russian Orthodox Church by Patriarch Nikon of Moscow in the 17th century. Although all of the groups of Old Believers emerged as a result of opposition to the Nikonian reforms, they do not constitute a single monolithic body. Despite their emphasis on invariable adherence to the pre-Nikonian traditions, the Old Believers feature a great diversity of groups which profess different interpretations of church tradition and they are often not in communion with each other (some groups even practise re-baptism before admitting a member of another group into their midst).

Churches not in communion with other churches

Churches with irregular or unresolved canonical status are entities that have carried out episcopal consecrations outside of the norms of canon law or whose bishops have been excommunicated by one of the 14 autocephalous churches. These include nationalist and other schismatic bodies such as the Abkhazian Orthodox Church.

Notes

^ Protestantism, as a whole, is larger, but is not a single church nor is it a single denomination.
^ The numerous Protestant groups in the world, if taken all together, substantially outnumber the Eastern Orthodox, but they differ theologically and do not form a single communion.^[187]
^ According to Roman Lunkin in an interview about the 2012 survey published by Среда (Sreda), about 40% of the Russian Federation population is Orthodox. However, only 5% belong to a parish or regularly attend Divine Liturgy. Lunkin said that this was long known by experts but a myth persists that 80–90% of the population is Orthodox.^[193] According to The World Factbook 2006 estimate, 15–20% are practising Russian Orthodox but there is a large populations of non-practising believers.^[194]
^ Data are estimated, there are no census figures available, Greece is said to be 98% Orthodox by CIA, but additional studies found only 60–80% believe in God, if true, then no more than 80% may be Orthodox.
^ With an absolute majority in the subnational entity of Republika Srpska
^ According to Alexei Krindatch, "the total number of Orthodox parishes" increased by 16% from 2000 to 2010 in the United States, from this, he wrote that Orthodox Churches are growing.^[207]^: 2 Krindatch did not provide figures about any change in the membership over that same period in his 2010 highlight.
^ According to Oliver Herbel, in Turning to Tradition, the 2008 US Religious Landscape Survey "suggests that if there is growth, it is statistically insignificant."^[208]^: 9 The 2014 US Religious Landscape Survey also shows, within the survey's ±9.2% margin of sampling error corresponding to the sample size of the Orthodox Christian category being 186 people, a statistically insignificant decline within the category "Orthodox Christians" as the percentage of population from 2007 to 2014.^[209]^{: 4, 21, 36, 93} But only 53% of people who were Orthodox Christian as children still self identify as Orthodox Christian in 2014.^[209]^: 39 The Orthodox Christian category "is most heavily made up of immigrants and the children of immigrants."^[209]^: 53
^ The primate of the Polish Orthodox Church is referred to as Archbishop of Warsaw and Metropolitan of All Poland, but the Polish Orthodox Church is officially a Metropolis^[291]

References

^ Rus' is a region inhabited by East Slavs who were once ruled by princes from the Rurik dynasty. This term refers to the Middle Ages, in contrast to the more recent (15th century) term "Russia". See also: Names of Rus', Russia and Ruthenia.

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On 23 February 1996, in response to the one-sided and illegal actions of Patriarch Bartholomew the Holy Synod of the Russian Orthodox Church resolved to recognise them 'as schismatic and compelling our Church to suspend canonical and Eucharistic communion with the Patriarchate of Constantinople… and to omit the name of the Patriarch of Constantinople in the diptych of the Primates of the Local Orthodox Churches.'
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^ Ware 1993, pp. 274–277.
^ Ware 1993, pp. 277–278.
^ Ware 1993, p. 278.
^ Fr. Thomas Hopko (1981). "The Orthodox Faith". St. Vladimir's Seminary Press. Archived from the original on 25 October 2011. Retrieved 11 November 2013.
^ Ware 1993, pp. 278–279.
^ Harakas 1987, pp. 56–57.
^ ^a ^b ^c Ware 1993, p. 279.
^ Harakas 1987, p. 57.
^ Ware 1993, p. 287.
^ "Letter to Families by Pope John Paul II". Archived from the original on 5 April 2011.
^ John Meyendorff (1975). Marriage: An Orthodox Perspective. St. Vladimir's Seminary Press. p. 13. ISBN 978-0-913836-05-7. Retrieved 20 February 2016.
^ "Statement of Orthodox Christian Bishops" (PDF). Archived from the original (PDF) on 10 June 2011.
^ "OCA Reaffirms SCOBA Statement in Wake of Massachusetts Same-Sex Marriage Ruling". 17 May 2004. Retrieved 4 August 2010.
^ ^a ^b John Meyendorff (1975). Marriage: An Orthodox Perspective. St. Vladimir's Seminary Press. p. 18. ISBN 978-0-913836-05-7. Retrieved 20 February 2016.
^ Mgr. Athenagoras Peckstadt, Bishop of Sinope (18 May 2005). "Marriage, Divorce and Remarriage in the Orthodox Church: Economia and Pastoral Guidance". The Orthodox research Institute. Retrieved 19 November 2008.
^ Karras, Valerie A. (June 2004). "Female Deacons in the Byzantine Church". Church History. 73 (2): 272–316. doi:10.1017/S000964070010928X. ISSN 0009-6407. S2CID 161817885.
^ "Breaking with tradition, Greek Orthodox Church ordains first woman deacon in Africa". La croix international. 13 May 2024.
^ Barillas, Martin (2024-05-09). "Orthodox Church Ordains Female Deacon". National Catholic Register.
^ "Eastern Orthodox Church ordains Zimbabwean woman as its first deaconess". The Christian Century.
^ Isper, Saba. "What is the Goal?". Antiochian Orthodox Christian Archdiocese of North America.
^ Whiteford, John. "DEACONESSES, FEMALE DEACONS, AND THE AGENDA OF THE ST. PHOEBE CENTER". Orthochristian.com.
^ "Female Priests? Women Deacons Refuted by Fr John Whiteford -Jay Dyer". YouTube.
^ Ware 1993, p. 322 "From the beginning of the twentieth century the Ecumenical Patriarchate has shown a special concern for Christian reconciliation. At his accession in 1902, Patriarch Joachim III sent an encyclical letter to all the autocephalous Orthodox Churches, asking in particular for their opinion on relations with other Christian bodies. In January 1920 the Ecumenical Patriarchate followed this up with a bold and prophetic letter addressed 'To all the Churches of Christ, wherever they may be', urging closer co-operation among separated Christians, and suggesting a 'League of Churches', parallel to the newly founded League of Nations. Many of the ideas in this letter anticipate subsequent developments in the WCC. Constantinople, along with several of the other Orthodox Churches, was represented at the Faith and Order Conferences at Lausanne in 1927 and at Edinburgh in 1937. The Ecumenical Patriarchate also participated in the first Assembly of the WCC at Amsterdam in 1948, and has been a consistent supporter of the work of the WCC ever since."
^ Fuchs, Lorelei F. (2008). Koinonia and the Quest for an Ecumenical Ecclesiology. Wm. B. Eerdmans Publishing. p. 162. ISBN 978-0-8028-4023-3. Addressed "to all the Churches of Christ, wheresoever they be", the letter of the Ecumenical Patriarchate opens the words anticipating the spirit of the ecclesial bodies which would later form the World Council of Churches.
^ Benz, Ernst (31 July 2008). The Eastern Orthodox Church. Transaction Publishers. p. 197. ISBN 978-0-202-36575-6. A large number of Orthodox Churches are members of the World Council of Churches; Orthodox ecclesiastics and theologians serve on its committees and attend its conferences.
^ Ware 1993, p. 322.
^ "From Russia, with Love". Christianity Today. Retrieved 31 December 2007. Many evangelicals share conservative positions with us on such issues as abortion, the family, and marriage. Do you want vigorous grassroots engagement between Orthodox and evangelicals? Yes, on problems, for example, like the destruction of the family. Many marriages are split. Many families have either one child or no child.
^ Orthodox Christian Information Center. An Orthodox View of the Virgin Mary. Retrieved 10 November 2016.
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^ "Saint George Coptic Church". Coptic Orthodox Diocese of the Southern United States. Retrieved 3 April 2014.
^ "Предстоятель ПЦУ Епіфаній: Найперше мусимо зберегти свою незалежність".
^ "Блаженніший Святослав: "Відновлення євхаристійного спілкування між Римом і Константинополем не є утопією"".
^ Bat Ye'or, The Decline of Eastern Christianity Under Islam
^ "From Russia, with Love". Christianity Today. Retrieved 31 December 2007. If we speak about Islam (and of course if we mean moderate Islam), then I believe there is the possibility of peaceful coexistence between Islam and Christianity. This is what we have had in Russia for centuries, because Russian Islam has a very long tradition. But we never had religious wars. Nowadays we have a good system of collaboration between Christian denominations and Islam.
^ "Ecumenical Patriarchate". Retrieved 5 March 2015.
^ "Orthodox | Metrolopolia". www.orthodox.pl. Retrieved 5 January 2019.
^ "Η Εκκλησία της Ελλάδος αναγνώρισε την Αυτοκέφαλη Εκκλησία της Ουκρανίας" [The Church of Greece recognised the Autocephalous Church of Ukraine]. eleftherostypos.gr. Eleutheros Typos. 12 October 2019. Retrieved 12 October 2019.
^ "The Church of Greece has recognized the Autocephalous Church of Ukraine (upd)". Orthodox Times. 12 October 2019. Retrieved 12 October 2019.
^ "It's Official: Church of Greece Recognizes the Autocephaly of the Orthodox Church of Ukraine". The Orthodox World. 12 October 2019. Archived from the original on 12 October 2019. Retrieved 12 October 2019.
^ "Archbishop of Cyprus commemorates Metropolitan Epifaniy of Kyiv for first time (upd)". Orthodox Times. 24 October 2020. Retrieved 24 October 2020.
^ "Кіпрська Церква визнала Православну Церкву України". Релігійно-інформаційна служба України (in Ukrainian). Retrieved 24 October 2020.
^ "Archbishop of Cyprus: My decision to commemorate Metropolitan Epifaniy first serves Orthodoxy". Orthodox Times. 24 October 2020. Retrieved 24 October 2020.
^ Митрополит Киевский Епифаний заявил, что в ближайшее время еще несколько поместных православных церквей признают ПЦУ. НВ (Новое Время) (in Russian). 5 December 2019.
^ "Holy Synod – Encyclicals – Archpastoral Letter on Ukraine".
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A repository with scientific papers on various aspects of the Byzantine Orthodox Church in English and in German

[13] Protestantism, as a whole, is larger, but is not a single church nor is it a single denomination.

[190] The numerous Protestant groups in the world, if taken all together, substantially outnumber the Eastern Orthodox, but they differ theologically and do not form a single communion.^[187]

[198] According to Roman Lunkin in an interview about the 2012 survey published by Среда (Sreda), about 40% of the Russian Federation population is Orthodox. However, only 5% belong to a parish or regularly attend Divine Liturgy. Lunkin said that this was long known by experts but a myth persists that 80–90% of the population is Orthodox.^[193] According to The World Factbook 2006 estimate, 15–20% are practising Russian Orthodox but there is a large populations of non-practising believers.^[194]

[201] Data are estimated, there are no census figures available, Greece is said to be 98% Orthodox by CIA, but additional studies found only 60–80% believe in God, if true, then no more than 80% may be Orthodox.

[202] With an absolute majority in the subnational entity of Republika Srpska

[214] According to Alexei Krindatch, "the total number of Orthodox parishes" increased by 16% from 2000 to 2010 in the United States, from this, he wrote that Orthodox Churches are growing.^[207]^: 2 Krindatch did not provide figures about any change in the membership over that same period in his 2010 highlight.

[217] According to Oliver Herbel, in Turning to Tradition, the 2008 US Religious Landscape Survey "suggests that if there is growth, it is statistically insignificant."^[208]^: 9 The 2014 US Religious Landscape Survey also shows, within the survey's ±9.2% margin of sampling error corresponding to the sample size of the Orthodox Christian category being 186 people, a statistically insignificant decline within the category "Orthodox Christians" as the percentage of population from 2007 to 2014.^[209]^{: 4, 21, 36, 93} But only 53% of people who were Orthodox Christian as children still self identify as Orthodox Christian in 2014.^[209]^: 39 The Orthodox Christian category "is most heavily made up of immigrants and the children of immigrants."^[209]^: 53

[300] The primate of the Polish Orthodox Church is referred to as Archbishop of Warsaw and Metropolitan of All Poland, but the Polish Orthodox Church is officially a Metropolis^[291]

[134] Rus' is a region inhabited by East Slavs who were once ruled by princes from the Rurik dynasty. This term refers to the Middle Ages, in contrast to the more recent (15th century) term "Russia". See also: Names of Rus', Russia and Ruthenia.

[Pew20152016-1] "Religious Belief and National Belonging in Central and Eastern Europe". Pew Research Center's Religion & Public Life Project. 10 May 2017.

[vern1-2] "Eastern Orthodoxy – Worship and sacraments". Encyclopedia Britannica. Retrieved 13 April 2020.

[vern2-3] Fiske, Edward B. (3 July 1970). "Greek Orthodox Vote to Use Vernacular in Liturgy". The New York Times. ISSN 0362-4331. Retrieved 13 April 2020.

[vern3-4] "Liturgy and archaic language | David T. Koyzis". First Things. 27 October 2009. Retrieved 13 April 2020.

[5] Meyendorff, John (7 December 2023). "Eastern Orthodoxy". Encyclopaedia Britannica. Retrieved 8 December 2023.

[Peworthodox-6] "Orthodox Christianity in the 21st Century". Pew Research Center's Religion & Public Life Project. 8 November 2017. Archived from the original on 25 January 2021. Retrieved 14 May 2020.

[CSGC-2019-7] "Status of Global Christianity, 2019, in the Context of 1900–2050" (PDF). Center for Study of Global Christianity. Archived (PDF) from the original on 28 July 2020. Retrieved 14 May 2020.

[8] Fairchild, Mary. "Christianity:Basics:Eastern Orthodox Church Denomination". about.com. Archived from the original on 5 June 2016. Retrieved 23 June 2014.

[Britannica-9] "Eastern Orthodoxy". Encyclopædia Britannica Online. 18 May 2023. Eastern Orthodoxy, official name, used in British English as well, is Orthodox Catholic Church, one of the three major doctrinal and jurisdictional groups of Christianity.

[ellwood-10] Ellwood, Robert S.; Alles, Gregory D. (2007). Ellwood Encyclopedia of World Religions. Infobase. p. 128. ISBN 978-1-4381-1038-7. The Eastern Orthodox Churches are properly known as the "Orthodox Catholic Church

[tsichlis-11] Tsichlis, Fr. Steven. "Frequently Asked Questions About the Orthodox Church". St. Paul's Greek Orthodox Church, Irvine, CA. Archived from the original on 10 December 2013. Retrieved 4 May 2014. The full title of our Church is 'The Orthodox Catholic Church.'

[EBGreek-12] Encyclopædia Britannica Online | loc="Eastern Orthodoxy" "Because of the use of the name 'Greek Catholics' by the Eastern churches of the Catholic Church and the historical links of the Orthodox Catholic church with the Eastern Roman Empire and Byzantium (Constantinople), however, the exonyms in American English usage referred to it as the 'Eastern' or 'Greek Orthodox' Church. These terms are sometimes misleading, especially when applied to Russian or Slavic churches and to the Orthodox communities in western Europe and America."

[14] Johnson, Todd M. "Status of Global Christianity, 2019, in the Context of 1900–2050" (PDF). Center for the Study of Global Christianity.

[:0-15] Parry, Ken; Melling, David J.; Brady, Dimitri; Griffith, Sidney H.; Healey, John F., eds. (1 September 2017) [1999]. "Eastern Orthodox". The Blackwell Dictionary of Eastern Christianity. Oxford, UK: Blackwell Publishing Ltd. p. 170. doi:10.1002/9781405166584. ISBN 978-1-4051-6658-4. The Eastern Orthodox are the second largest Christian communion, exceeded in members only by the Roman Catholic communion.

[BBC1-16] "BBC – Religions – Christianity: Eastern Orthodox Church". BBC.

[aboutWeb-17] Fairchild, Mary. "Christianity:Basics:Eastern Orthodox Church Denomination". About. Archived from the original on 5 June 2016. Retrieved 22 May 2014.

[18] "The Patriarch Bartholomew". 60 Minutes. CBS. 20 December 2009. Retrieved 26 June 2021.

[19] "Biography – The Ecumenical Patriarchate". Ecumenical Patriarchate. Retrieved 11 December 2019.

[20] Winfield, Nicole; Fraser, Suzan (30 November 2014). "Pope Francis Bows, Asks For Blessing From Ecumenical Patriarch Bartholomew In Extraordinary Display Of Christian Unity". Huffington Post. Archived from the original on 17 March 2016. Retrieved 11 December 2019.

[21] Finding Global Balance. World Bank Publications. 2005. p. 119. Retrieved 8 December 2023. His All Holiness Ecumenical Patriarch Bartholomew is the spiritual leader of 300 million Orthodox Christians worldwide.

[FOOTNOTEWare19938-22] Ware 1993, p. 8.

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[24] Meyendorff, John (1983). Byzantine Theology: Historical Trends and Doctrinal Themes. Fordham University Press.

[25] Peter, Laurence (17 October 2018). "Orthodox Church split: Five reasons why it matters". BBC. The Moscow-based Russian Orthodox Church has at least 150 million followers – more than half the total of Orthodox Christians. ... But Mr Shterin, who lectures on trends in ex-Soviet republics, says some Moscow-linked parishes will probably switch to a new Kiev-led church, because many congregations 'don't vary a lot in their political preferences.'

[26] "Orthodox Christianity's geographic center remains in Central and Eastern Europe". Pew Research Center's Religion & Public Life Project. 8 November 2017. Retrieved 9 December 2020.

[Guardian-27] Harriet Sherwood (13 January 2016). "Christians flee growing persecution in Africa and Middle East". The Guardian.

[K4D-28] Huma Haider University of Birmingham (16 February 2017). "K4D The Persecution of Christians in the Middle East" (PDF). Publishing Service U.K. Government.

[:1-29] Parry, Ken; Melling, David J.; Brady, Dimitri; Griffith, Sidney H.; Healey, John F., eds. (1 September 2017) [1999]. "Eastern Orthodox". The Blackwell Dictionary of Eastern Christianity. Oxford, UK: Blackwell Publishing Ltd. pp. 169–70. doi:10.1002/9781405166584. ISBN 978-1-4051-6658-4.

[:112-30] Prokurat, Michael; et al., eds. (1996). "ECUMENICAL COUNCILS". Historical dictionary of the Orthodox church. Scarecrow Press. pp. 114–5. ISBN 0-8108-3081-7. OCLC 797749844.

[:12-31] Parry, Ken; Melling, David J.; Brady, Dimitri; Griffith, Sidney H.; Healey, John F., eds. (2017-09-01) [1999]. "ecumenical councils". The Blackwell Dictionary of Eastern Christianity. Oxford, UK: Blackwell Publishing Ltd. pp. 171–2. doi:10.1002/9781405166584. ISBN 978-1-4051-6658-4.

[:02-32] Parry, Ken; Melling, David J.; Brady, Dimitri; Griffith, Sidney H.; Healey, John F., eds. (1 September 2017) [1999]. "Western rite Orthodoxy". The Blackwell Dictionary of Eastern Christianity. Oxford, UK: Blackwell Publishing Ltd. pp. 514–5. doi:10.1002/9781405166584. ISBN 978-1-4051-6658-4.

[33] "About Orthodox". Saint Mary Antiochian Orthodox Church, Pawtucket, RI. Retrieved 4 May 2014. The official designation of the Orthodox Church is the 'Eastern Orthodox Catholic and Apostolic Church.'

[34] "To be an Orthodox Christian ..." Orthodox Christian Church in Thailand (Moscow Patriarchate). Archived from the original on 26 August 2014. Retrieved 4 May 2014.

[Losch2002-35] Richard R. Losch (1 May 2002). The Many Faces of Faith: A Guide to World Religions and Christian Traditions. Wm. B. Eerdmans Publishing. p. 76. ISBN 978-0-8028-0521-8. The official name of the body is the Orthodox Catholic Church.

[36] The monks of Decani Monastery, Kosovo. "The Orthodox Church, An Introduction". Orthodox Christian Information Center. Retrieved 3 May 2014. The official designation of the church in its liturgical and canonical texts is "the Orthodox Catholic Church"

[37] "What We Believe". The Orthodox Church. The Diocese of Eastern Pennsylvania, Orthodox Church in America. Archived from the original on 13 July 2015. Retrieved 3 May 2014. The official designation of the church in its liturgical and canonical texts is "the Orthodox Catholic Church" (gr. catholicos = universal).

[38] "About Orthodoxy". The Orthodox Church. Berlin, MD: Christ the Saviour Orthodox Church. Retrieved 3 May 2014. The official designation of the church in its liturgical and canonical texts is "the Orthodox Catholic Church" (gr. catholicos = universal).

[39] "The Holy Orthodox Christian Church: Its Faith and Life". Archangels Books. Retrieved 4 May 2014. The official designation of the church in its liturgical and canonical texts is "the Orthodox Catholic Church" (gr. catholicos = universal).

[40] "Orthodox Christianity – Introduction". Serbian Orthodox Diocese of Ras and Prizren. Archived from the original on 15 May 2012. Retrieved 4 May 2014. The official designation of the church in its liturgical and canonical texts is "the Orthodox Catholic Church" (gr. catholicos = universal).

[41] "About Orthodoxy". Holy Ascension Orthodox Church, Frackville, PA. Retrieved 4 May 2014. The official designation of the church in its liturgical and canonical texts is "the Orthodox Catholic Church" (greek catholicos = universal).

[42] "Eastern Orthodoxy | Definition, Origin, History, & Facts | Britannica". Encyclopaedia Britannica. Retrieved 11 November 2021. The official designation of the church in Eastern Orthodox liturgical or canonical texts is 'the Orthodox Catholic Church.' Because of the historical links of Eastern Orthodoxy with the Eastern Roman Empire and Byzantium (Constantinople), however, in English usage it is referred to as the 'Eastern' or 'Greek Orthodox' Church.

[FOOTNOTEMerriam-Webster_Encyclopedia_of_World_Religions1999[httpsbooksgooglecombooksidZP_f9icf2roCpg309_309]:_"The_official_designation_of_the_church_in_Eastern_Orthodox_liturgical_or_canonical_texts_is_'the_Orthodox_Catholic_Church.<span_style="padding-right:.15em;">'</span>"-43] Merriam-Webster Encyclopedia of World Religions 1999, p. 309: "The official designation of the church in Eastern Orthodox liturgical or canonical texts is 'the Orthodox Catholic Church.'".

[FOOTNOTEWare1993307-44] Ware 1993, p. 307.

[FOOTNOTEFitzgerald1998[httpsbooksgooglecombooksid_F5yntZocGICpgPA8_8]-45] Fitzgerald 1998, p. 8.

[FOOTNOTEDe_Vie1945-46] De Vie 1945.

[FOOTNOTENielsenJohnsonEllis2001248_"In_the_Eastern_Orthodox_Catholic_Church,_authority"-47] Nielsen, Johnson & Ellis 2001, p. 248 "In the Eastern Orthodox Catholic Church, authority".

[FOOTNOTEFortescue2008[httpsarchiveorgdetailsbub_gb_UPr1ZCxPW6QCpagen290_255]_"it_is_all_gathered_together_and_still_lives_in_the_Holy_Apostolic_Orthodox_Catholic_Church_of_the_Seven_Councils."-48] Fortescue 2008, p. 255 "it is all gathered together and still lives in the Holy Apostolic Orthodox Catholic Church of the Seven Councils.".

[FOOTNOTESchadé_Encyclopedia_of_World_Religions2006-49] Schadé Encyclopedia of World Religions 2006.

[FOOTNOTELosch2002[httpsbooksgooglecombooksidOdKCVjCschMCpgPA76_76]-50] Losch 2002, p. 76.

[FOOTNOTEMerriam-Webster_Encyclopedia_of_World_Religions1999[httpsbooksgooglecombooksidZP_f9icf2roCpg309_309–310]-51] Merriam-Webster Encyclopedia of World Religions 1999, pp. 309–310.

[52] "The Longer Catechism of The Orthodox, Catholic, Eastern Church". Pravoslavieto. Retrieved 27 September 2021.

[FOOTNOTEEncyclopædia_Britannica_Online[httpswwwbritannicacomEBcheckedtopic177174Eastern-Orthodoxy_"Eastern_Orthodoxy"]_"Because_of_the_use_of_the_name_'Greek_Catholics'_by_the_Eastern_churches_of_the_Catholic_Church_and_the_historical_links_of_the_Orthodox_Catholic_church_with_the_Eastern_Roman_Empire_and_Byzantium_(Constantinople),_however,_the_[[exonym]]s_in_American_English_usage_referred_to_it_as_the_'Eastern'_or_'Greek_Orthodox'_Church._These_terms_are_sometimes_misleading,_especially_when_applied_to_Russian_or_Slavic_churches_and_to_the_Orthodox_communities_in_western_Europe_and_America."-53] Encyclopædia Britannica Online, "Eastern Orthodoxy" "Because of the use of the name 'Greek Catholics' by the Eastern churches of the Catholic Church and the historical links of the Orthodox Catholic church with the Eastern Roman Empire and Byzantium (Constantinople), however, the exonyms in American English usage referred to it as the 'Eastern' or 'Greek Orthodox' Church. These terms are sometimes misleading, especially when applied to Russian or Slavic churches and to the Orthodox communities in western Europe and America.".

[Calivas1983-54] Fitzgerald, Thomas (9 January 1996). "The Orthodox Church: An Introduction". Greek Orthodox Archdiocese of America. Archived from the original on 3 June 2016. Retrieved 11 June 2016.

[CathEnc-55] Thurston, Herbert (1908). "Catholic". In Knight, Kevin (ed.). The Catholic Encyclopedia. Vol. 3. New York: Robert Appleton Company. Retrieved 17 August 2012.

[FOOTNOTEHardon1981[httpsbooksgooglecombooksid3Ke37zpSv3gCpgPA217_217]-56] Hardon 1981, p. 217.

[57] δοκέω in Liddell and Scott.

[FOOTNOTEWare199116,_271-58] Ware 1991, pp. 16, 271.

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[308] "Holy Synod – Encyclicals – Archpastoral Letter on Ukraine".

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[politika2-311] Beoković, Jelena (1 May 2010). "Ko su ziloti, pravoslavni fundamentalisti" [Who are Zealots, Orthodox Fundamentalists]. Politika. Retrieved 5 August 2014.

[note_n0-312] The ROC severed full communion with the Ecumenical Patriarchate in 2018, and later severed full communion with the primates of the Church of Greece, the Patriarchate of Alexandria, and the Church of Cyprus in 2020.

[note_n1-313] ^ ^a ^b ^c ^d ^e ^f ^g ^h Autocephaly or autonomy is not universally recognized.

[note_n3-314] UOC-MP was moved to formally cut ties with the ROC as of May 27th 2022.

[note_n2-315] Semi-autonomous part of the Russian Orthodox Church whose autonomy is not universally recognized.

[note_n0-320] Even though the Council was moved to Ferrara in 1438 and later to Florence, some bishops refused to move and remained in a parallel Council at Basel.

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