Wikipedia:Selected anniversaries/November 27
- 1095 – At the Council of Clermont, Pope Urban II called for the First Crusade, declaring bellum sacrum against the Muslims who had occupied the Holy Land and were attacking the Eastern Roman Empire.
- 1895 – Swedish chemist and industrialist Alfred Nobel signed his last will and testament, setting aside the bulk of his estate to establish the Nobel Prize after his death.
- 1926 - Restoration of Colonial Williamsburg (pictured) in the Historic Triangle on the Virginia Peninsula, United States began.
- 2001 – The Hubble Space Telescope detected sodium in the atmosphere of the extrasolar planet HD 209458b, the first planetary atmosphere outside our solar system to be measured.
- 2005 – French oral and maxillofacial surgeon Bernard Devauchelle performed the world's first partial face transplant on a living human, replacing Isabelle Dinoire's face after her Labrador dog mauled her.
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