Events

• January 6 - Constantine XI is crowned Byzantine Emperor. He will be the last in a line of rulers that can be traced to the founding of Rome.
• September 8 - Battle of Tumu Fortress - Oyirad Mongolians defeat the Chinese Ming Dynasty army and capture Zhengtong Emperor of China
• French capture Rouen

Births

• January 1 - Lorenzo de' Medici, Italian statesman
• October 21 - George, Duke of Clarence, brother of Edward IV of England and Richard III of England (d. 1478)

Deaths

• October 27 - Ulugh Beg, Timurid astronomer.