Events

• Kublai Khan named his empire "Yuan" (元 yuan2), officially marking the start of the Yuan Dynasty.
• The 1st Peace of Pressburg is signed in Bratislava on July 2 between Czech king Ottokar II and King Stephen V of Hungary.
• Gregory X is named Pope
• Baibars, a Mameluk sultan of Egypt, conquers the Krak des Chevaliers
• Baibars conquers the Crusader Principality of Antioch
• Edward I of England organizes the Ninth Crusade against Baibars
• Thomas Agni of Cosenza named Latin Patriarch of Jerusalem
• Burnham, Buckinghamshire, England receives a Royal charter allowing it to hold a market and an annual fair
• Kitzbühel officially granted the rights of a city by Louis II of Bavaria

Births

• September 8 - Charles Martel, titular king of Hungary
• September 17 - Wenceslaus II of Bohemia and Poland (d. 1305)
• Jeanne of Navarre, Queen Consort of France
• Hojo Sadatoki , regent of the Kamakura Shogunate
• Duke Rudolph II of Austria

Deaths

• August 21 - Alphonse of Toulouse, in Italy, returning from the Eighth Crusade
• October 27 - Hugh IV, Duke of Burgundy

Heads of State

• Aragon - James I King of Aragon and count of Barcelona (reigned from 1213 to 1276)