Wikipedia:Selected anniversaries/August 26
- 1071 - The Seljuk Turks defeated the Byzantine Empire at the Battle of Manzikert, which marked the decline of Byzantine fortunes
- 1789 - French revolution: The Declaration of the Rights of Man and of the Citizen was approved by Constituent Assembly at Versailles
- 1839 - The slave-held Amistad landed off Long Island.
- 1883 - Volcanic eruption of Krakatoa in Indonesia generated disastrous tsunami waves, destroying many settlements on Java and Sumatra, and killing 36,000 people.
- 1968 - The Beatles' "Hey Jude" was released as a single in the United States