Centuries: 12th century - 13th century - 14th century
- May 18 - the Principality of Antioch falls to Mameluk Sultan Baibars.
- Philip I becomes count of Savoy.
- Stephen V of Hungary launches a war against Bulgaria.
- Stefan Dragutin, king of Serbia, marries Katarina, daughter of Stephen V of Hungary.
- The county of Wernigerode become a vassal state of the margrave of Brandenburg.
- An earthquake in Cilicia kills 60 000 people.
- Hojo Tokimune becomes regent of the Kamakura Shogunate.
- October 29 - Frederick I, Margrave of Baden (executed by Charles I of Sicily)
- October 29 - Conradin, duke of Swabia and King of Jerusalem (executed by Charles I of Sicily)
- November 29 - Pope Clement IV
- Peter II of Savoy