Historical Events
- Apr 13 Diet of Gelnhausen; Henry the Lion deprived of the Duchy of Saxony
- Apr 28 Philip II of France (14) marries first wife Isabella of Hainault (10) at Bapaume
- Aug 17 Yoritomo Minamoto leads uprising against Kiyomori Taira who installed his grandson, Emperor Antoku, to the throne
- Sep 14 Minamoto no Yoritomo led force of 300 defeated at Battle of Ishibashiyama in Japan
- Sep 18 Philip Augustus becomes king of France
- Sep 24 Manuel I Komnenos, last Emperor of the Komnenian restoration dies. The Byzantine Empire slips into terminal decline.
Famous People Who Died in 1180
- Aug 11 Guillaume de/Willem van Sens, Fren master builder (Canterbury), dies
- Sep 18 Louis VII, King of France (1137-1180), dies at 59 or 60
- Sep 19 Louis VII, the Younger, King of France (1137-80), dies at 59
- Sep 24 Manuel I Komnenos, Emperor of the Byzantine Empire (1143-80), dies at 61