Events

• Shams ad-Din disappears resulting in Jalal Uddin Rumi writing 30,000 verses of poetry about his disappearance.
• Romford, London, England is chartered as a market town.
• Bedlam becomes part of London.
• Thuringian War of Succession begins.
• Ch'in Chiu-Shao publishes the original form of the Chinese remainder theorem.
• Pope Innocent IV sends missionaries to attempt to convert the Mongols.
• Egypt takes control of Jerusalem from the Kharezmians.
• Nijmegen becomes part of Gelderland.
• The Romanesque cathedral of St. Pierre is begun in Beauvais.
• Afonso III succeeds Sancho II as King of Portugal.
• Saint Louis massacres the last remaining Catharists at Montségur.

Births

• Chang San Feng
• Hugh of Lincoln, supposed victim of blood libel
• Angelo da Clareno, founder of a group of Fraticelli
• Isabelle d'Aragon, wife of Philip III of France
• Possible birthdate of Zhang Sanfeng, a semi-mythical Taoist master

Deaths

• William de Ferrers, 4th Earl of Derby
• Heinrich Raspe, Landgrave of Thuringia

Monarchs/Presidents

• 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)