What Happened in 1073
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- Apr 22 Pope Alexander II buried and Ildebrando chosen as Pope Gregory VII
- Apr 21 Alexander II [Anselmo da Baggio], Pope (1061-73), dies
- Jun 15 Go-Sanjō, 71st Emperor of Japan (1068-73), dies at 38
- Jul 12 Johannes Gualbertus, Italian monk/saint, dies
- Dec 20 Dominic of Silos, Spanish Benedictine monk and Roman Catholic saint, dies at 73 [exact birthdate uncertain]