Major Events
- Jan 20 First English Parliament summoned other than by royal command, in this instance by Simon de Montfort, Earl of Leicester. Meets in Westminster Hall.
- Jan 23 1st English Parliament not summoned by the monarch formally convened (some authorities)
- Aug 4 Battle of Evesham: English Prince Edward (later Edward I) defeats baronial forces of Simon de Montfort, who is killed and his body mutilated
More People Born in 1265
Who Died in 1265
- Feb 8 Hulagu Khan, Mongol ruler, grandson of Genghis Khan (besieged and pillaged Baghdad) (b. 1217)
- May 16 Saint Simon Stock, English saint (b. 1165)
- Aug 4 Hugh le Despencer, 1st Baron le Despencer (one of the leaders of the baronial rebellion against Henry III), killed at the Battle of Evesham (b. 1223)
- Aug 4 Simon de Montfort, English Earl of Leicester (led baronial rebellion against Henry III), dies at the Battle of Eversham
- Dec 3 Odofredus, Italian jurist