Editing October 22 (section)

===Pre-1600===
* [[451]] &ndash; The [[Chalcedonian Creed]], regarding the divine and human nature of Jesus, is adopted by the [[Council of Chalcedon]], an ecumenical council.<ref>{{cite book|author1=Richard Price|author2=Michael Gaddis|title=The Acts of the Council of Chalcedon|url=https://books.google.com/books?id=6IUaOOT1G3UC&pg=RA1-PA183|year=2005|publisher=Liverpool University Press|isbn=978-0-85323-039-7|pages=183}}</ref>
* [[794]] &ndash; Japanese [[Emperor Kanmu]] relocates his empire's capital to [[Heian-kyō]] (now Kyoto).<ref>{{cite book|author=Muhammad Abdul Jabbar Beg|title=Historic Cities of Asia: An Introduction to Asian Cities from Antiquity to Pre-modern Times|url=https://books.google.com/books?id=rWPaAAAAMAAJ|year=1986|publisher=M.A.J. Beg|isbn=978-967-9957-03-7|page=43}}</ref>
* [[906]] &ndash; Abbasid general [[Ahmad ibn Kayghalagh]] leads a raid against the Byzantine Empire, taking 4,000–5,000 captives.{{sfn|Rosenthal|1985|pp=172, 180}}
*[[1383]] &ndash; The male line of the [[Portuguese House of Burgundy]] becomes extinct with the death of King [[Ferdinand I of Portugal|Fernando]], leaving only his daughter Beatrice. Rival claimants begin a period of [[1383–85 Crisis|civil war]] and disorder.<ref>{{cite book|author=E. Michael Gerli|title=Medieval Iberia: An Encyclopedia|url=https://books.google.com/books?id=euVJAgAAQBAJ&pg=PA332|date=4 December 2013|publisher=Routledge|isbn=978-1-136-77162-0|pages=332}}</ref>