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- May 4 - Pope Alexander IV issues a papal bull Licet ecclesiae catholicae constituting the Augustinian monastic order at Lecceto Monastery.
- The city of Lviv, in present-day Ukraine, is founded by Danylo King of Rus.
- Theodore II Lascaris, Byzantine Emperor (in exile in the Empire of Nicaea), successfully concludes a military campaign started a year earlier to recover Thrace from the Bulgarians.
Abingdon School is founded. Roger Bacon becomes a Franciscan Friar.
- October - Mongol commander Baiju (operating under Hulagu Khan's command) leads his forces in a victory over Kay Ka'us II of the Sultanate of Rüm, thereby capturing Anatolia.
- December 15 - Hulagu Khan captures and destroys the Hashshashin stronghold at Alamut in present-day Iran.
- Hulagu Khan establishes the Ilkhanate dynasty of Persia, which will become one of four main divisions of the Mongol Empire.
- The Japanese Kenchō era ends, and the Kōgen era begins.
- January 6 - Gertrude the Great, German mystic
- Robert, Count of Clermont, French founder of the House of Bourbon (died 1317)
- Ibn al-Banna, Arab Mathematician (died 1321)