Historical Events In April - 13
Monday, 13 April 2026
0837 Best view of Halley's Comet in 2000 years 

0989 The Byzantine emperor Basil II uses 6,000 Russians to help him defeat Bardas Phocas at Abydos in Anatolia April 13, ending the threat to Constantinople 

0989 Battle at Abydos: Byzantine emperor Basilius II beats Bardas Phocas 

1055 Bishop Gebhard van Eichstattt named Pope Victor II 

1111 Pope Paschalis II crowns Roman catholics-German king Hendrik II 

1180 Republic day of Gelnhausen 

1204 Crusaders occupy Constantinople 

1241 Battle at Theiss: Mongols beat Hungarian King Béla IV 

1250 The Seventh Crusade is defeated in Egypt, Louis IX of France is captured 

1256 The Grand Union of the Augustinian order formed when Pope Alexander IV issues a papal bull Licet ecclesiae catholicae 

1346 Pope Clemens VI declares German emperor Louis of Bavaria, envoy 

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