Editing April 13 (section)

===Pre-1600===
*[[1111]] &ndash; [[Henry V, Holy Roman Emperor|Henry V]], King of Germany, is crowned [[Holy Roman Emperor]].<ref>{{cite book|author=Chrysogonus Waddell|title=Narrative and Legislative Texts from Early Cîteaux: Latin Text in Dual Edition with English Translation and Notes|url=https://books.google.com/books?id=X2nZAAAAMAAJ|year=1999|publisher=Abbaye de Cîteaux|page=429|isbn=9789080543911}}</ref>
*[[1204]] &ndash; [[Constantinople]] [[Sack of Constantinople|falls to the Crusaders]] of the [[Fourth Crusade]], temporarily ending the [[Byzantine Empire]].<ref>{{cite book|author=University Lecturer in History David Abulafia|title=The New Cambridge Medieval History: Volume 5, C.1198-c.1300|url=https://books.google.com/books?id=bclfdU_2lesC&pg=PA525|year=1995|publisher=Cambridge University Press|isbn=978-0-521-36289-4|pages=525}}</ref>
*[[1455]] &ndash; [[Thirteen Years' War (1454–1466)|Thirteen Years' War]]: the beginning of the [[Battle for Kneiphof]].<ref>{{Cite book |last=Rogalski |first=Leon |title=Dzieje Krzyżaków oraz ich stosunki z Polską, Litwą i Prusami |publisher=S. Orgelbrand |year=1846 |volume=II |location=Warsaw}}</ref>