Feb 8 Hulagu Khan, Mongol ruler, grandson of Genghis Khan (besieged and pillaged Baghdad) (b. 1217) Apr 25 Roger de Quincy, 2nd Earl of Winchester, English crusader May 16 Saint Simon Stock, English saint (b. 1165) Aug 4 Hugh le Despencer, 1st Baron le Despencer, killed in the Battle of Evesham (b. 1223) Aug 4 Simon de Montfort the younger, English Earl of Leicester, dies in battle Dec 3 Odofredus, Italian jurist 1264 Famous Deaths by Year 1266