Europe

• February 16 - Andrew of Longjumeau is dispatched by King Louis IX of France as an ambassador to meet with the Khan of the Mongols.
• May 26 - The Battle of Fossalta is fought.
• August 15 - The First Battle of Athenry is fought in Galway, Ireland.
• University College, the first College at Oxford, is founded with money gifted from the estate of William of Durham.
• The Moors lose possession of Alicante in Al-Andalus (Islamic Spain).
• King Afonso III of Portugal recaptures Faro in the Algarve from the Moors, thus ending the Portuguese Reconquista.
• Roger Bacon publishes a major scientific work, including writings of convex lens spectacles for treating long-sightedness and the first publication of the formula for gunpowder in the western world.
• The city of Mystras, Greece is fortified and a palace is constructed there by William II Villehardouin.
• The city of Stralsund (in present-day Germany) is burned to the ground by forces from the rival city of Lübeck.
• Swedish statesman Birger Jarl subjugates the province of Tavastia in Finland, securing Swedish power in Finland.
• Alphonse of Toulouse orders the expulsion of Jews from Poitou, France.
• Jean Mouflet makes an agreement with the abbot of Saint-Pierre-le-Vif in the Senonais region in France: in return for an annual payment, the monastery will recognize Jean as a "citizen of Sens". He is a leather merchant, has a leather shop that he leases for the rent of 50 shillings a year. The agreement is witnessed by Jean's wife, Douce, daughter of a wealthy and prominent citizen of Sens, Felis Charpentier.

Asia