Events
January 6 – Constantine XI is crowned Byzantine Emperor, at Mistra. He was the last in a line of rulers that can be traced to the founding of Rome. April 7 – The last Antipope, Felix V abdicates. April 19 – Pope Nicholas V elected by the Council of Basel April 25 – The Council of Basel dissolves itself. August 13 – Brandenburg Margrave Albrecht Achilles takes the Lichtenau fortress from Nuremberg in the First Margrave War. September 8 – Battle of Tumu Fortress – the Oirat Mongols defeat the Ming Dynasty army and capture the Zhengtong Emperor of China; the latter is officially deposed while his brother ascends as the Jingtai Emperor the next year in 1450. October 29 – French recapture Rouen from the English
Births
January 1 – Lorenzo de' Medici, Italian statesman (died 1492) October 21 – George Plantagenet, 1st Duke of Clarence, brother of Edward IV of England and Richard III of England (died 1478) date unknown – Domenico Ghirlandaio, Italian artist (died 1494) probable – Ilham Ghali khan of Kazan Khanate, (died 1490)
Deaths
May 20 – Infante Pedro, Duke of Coimbra (born 1392) October 27 – Ulugh Beg, Timurid ruler and astronomer (born 1394) date unknown Anne Beauchamp, 15th Countess of Warwick (born 1443) Alexander of Islay, Earl of Ross, Lord of the Isles