What Happened in 1205
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- Jan 6 Philip of Swabia becomes King of the Romans
- Apr 15 Battle at Adrianople: Bulgaria beats Emp Boudouin of Constantinople
- Jun 19 Pope Innocent III fires Adolf I as archbishop of Cologne
- Jul 15 Pope Innocent III states Jews are doomed to perpetual servitudea and subjugation due to crucifixion of Jesus
- Apr 1 Amalrik II, King of Cyprus/Jerusalem, dies
- May 7 Ladislaus III, Árpád dynasty King of Hungary and Croatia (1204-05), dies at 4 or 5 [exact birthdate uncertain]
- Jun 21 Enrico Dandolo, Doge of Venice (b. 1107)
- Jul 13 Hubert Walter, Archbishop of Canterbury and Justicier of England
- Sep 3 Petrus van Poitiers, French theologist (Sententiarum libri V), dies