Editing April 12 (section)

===Pre-1600===
* [[240]] &ndash; [[Shapur I]] becomes co-emperor of the [[Sasanian Empire]] with his father [[Ardashir I]].<ref>{{cite book|first=Christopher|last=Buck|title=Paradise and Paradigm: Key Symbols in Persian Christianity and the Baha'i Faith|url=https://books.google.com/books?id=TFNWbqJXQsEC&pg=PA54|date=13 May 1999|publisher=[[SUNY Press]]|isbn=978-0-7914-4062-9|pages=54–}}</ref>
* [[467]] &ndash; [[Anthemius]] is elevated to [[Roman emperor|Emperor of the Western Roman Empire]].<ref>{{cite book|first1=Lesley|last1=Adkins|author-link1=Roy and Lesley Adkins|first2=Roy A.|last2=Adkins|author-link2=Roy and Lesley Adkins|title=Handbook to Life in Ancient Rome|url=https://books.google.com/books?id=9JJdqJ8YGH8C&pg=PA36|year=1998|publisher=[[Oxford University Press|OUP USA]]|isbn=978-0-19-512332-6|pages=36}}</ref>
* [[627]] &ndash; King [[Edwin of Northumbria]] is converted to Christianity by [[Paulinus of York|Paulinus]], Bishop of [[York]].<ref>{{cite book|first=David|last=Rollason|author-link=David Rollason|title=Northumbria, 500-1100: Creation and Destruction of a Kingdom|url=https://books.google.com/books?id=4mSogG6ZqN4C&pg=PA77|date=25 September 2003|publisher=[[Cambridge University Press]]|isbn=978-0-521-81335-8|pages=77}}</ref>
*[[1012]] &ndash; Duke [[Oldřich, Duke of Bohemia|Oldřich of Bohemia]] deposes and blinds his brother [[Jaromír, Duke of Bohemia|Jaromír]], who flees to [[Greater Poland|Poland]].{{Citation needed|date=September 2024}}
*[[1204]] &ndash; The [[Crusaders]] of the [[Fourth Crusade]] breach the walls of [[Constantinople]] and [[Siege of Constantinople (1204)|enter the city]], which they completely occupy the following day.<ref>{{cite book|last=Claster|first=Jill N.|title=Sacred Violence: The European Crusades to the Middle East, 1095-1396|location=Toronto|publisher=University of Toronto Press|date=2009|isbn=9781442600584|url=https://books.google.com/books?id=JP6OzSDQJlwC|page=214}}</ref>