Events April 13 — Frederick Barbarossa issues the Gelnhausen Charter. September 24 - Alexius II Comnenus becomes Byzantine Emperor. November 18 — Philip II becomes King of France. During the third year of the Jisho era of Japan, a devastating whirlwind damages Kyoto. Emperor Antoku succeeds Emperor Takakura as emperor of Japan. Afonso I of Portugal is taken prisoner by Ferdinand II of Leon. Artois is annexed by France. Prince Mochihito amasses a large army and instigates t… (More on 1180)