1233

By area

Asia

• February 26 - Mongol–Jin War: The Mongols capture Kaifeng, the capital of the Jin Dynasty, after besieging it for months.
• December - The Mongol siege of Caizhou begins.

  Europe

• Winter - Spain: after the loss of Trujillo and Úbeda, Ibn Hud al-Yamadi has to request a truce from the king of Castile, Ferdinand III.
• The Castilian troops besiege the Muslim-held city of Peniscola.
• The rebellious city of San Severo is destroyed by Frederick II, Holy Roman Emperor.
• Elburg and Gendt get their city rights.
• Amadeus IV becomes count of Savoy.
• Pope Gregory IX forbids Jews to employ Christian servants.

  By topic

Religion

• Mustansiriya Madrasah is founded in Baghdad.