Events

• The philosophical doctrine Averroism is banned from Paris by bishop Etienne Tempier .
• Burma's Pagan empire begins to disintegrate after being defeated by Kublai Khan at Ngasaungsyan , near the Chinese border. The Khan ordered the invasion after the Burmese refused to pay tribute.
• Llywelyn ap Gruffyd is subdued in the First Welsh War.
• Nicholas III succeeds John XXI as pope.
• Ramkhamhaeng the Great becomes ruler of the Sukhothai kingdom.
• St George's cross is first used as the flag of England.

Births

Deaths

• May 20 - Pope John XXI (b. 1215)
• July 1 - Baibars, Mameluk sultan of Egypt (b. 1223)
• October 27 - Walter de Merton, Lord Chancellor and founder of Merton College
• Thomas Agni of Cosenza , Latin Patriarch of Jerusalem