1311

Events 
 March 15 – At the Battle of Halmyros, the Catalan Company beats Walter V of Brienne to take the Duchy of Athens.
 Bolingbroke Castle gets into the House of Lancaster.

 Births 
 June 24 – Philippa of Hainault, queen of Edward III of England (died 1369)
 August 13 – King Alfonso XI of Castile (died 1350)
 Peter I, Duke of Bourbon (died 1356)
 Margaret II, Countess of Hainaut (died 1356)
 Joan II of Navarre, daughter of King Louis X of France (died 1349)
 July 1 – Liu Ji, Chinese military strategist, officer, statesman and poet (d. 1375)

 Deaths 
 March 15 – Walter V of Brienne, Duke of Athens
 Antony Bek, bishop of Durham
 David VIII of Georgia (born 1273)
 James II of Majorca (born 1243)
 Bernard Saisset, Occitan bishop of Pamiers (born 1232)
 Arnold of Villanova, Spanish alchemist and physician (born 1235)
 Emperor Wuzong of Yuan China