Events

• Anthony of Padua, patron saint of lost items, is canonized.
• Pope Gregory IX, driven from Rome by a revolt, takes refuge at Anagni.
• The first edition of Tripitaka Koreana is destroyed by Mongol invaders.
• 15 June - Battle of Agridi: Henry I of Cyprus defeats the armies of Frederick II.

Births

• Arnolfo di Cambio, Florentine architect (d. 1310)
• Manfred of Sicily (approximate date; d. 1266)
• Bernard Saisset, Occitan bishop of Pamiers (d. 1311)

Deaths

• July 18 - John de Braose, Marcher Lord of Bramber and Gower
• Michael Scot, Scottish mathematician and astrologer (b. 1175)
• Tolui, son of Genghis Khan (b. c. 1190)
• William III of Sicily (executed) (b. 1208)

Monarchs

• Aragon - James I King of Aragon and count of Barcelona (reigned from 1213 to 1276)
• Castile - Ferdinand III, the Saint King of Castile and Leon (reigned from 1217 to 1252)
• Navarre - Sancho VII the Strong King of Navarre (reigned from 1194 to 1234)
• Portugal - Afonso II, the Fat, King of Portugal (reigned from 1212 to 1233)
• Poland - Konrad of Mazovia is succeeded by Henry I the Bearded
• Japan - Emperor Go-Horikawa succeeded by Emperor Shijō
• Mongol Empire - Ögedei Khan, Mongol khaghan (reigned from 1229 to 1241)