1323

January–December

• March 6 - Treaty of Paris: Louis I, Count of Flanders relinquishes his claim to Zeeland.
• July 18 - Thomas Aquinas is canonised.
• August 12 - The Treaty of Nöteborg between Sweden and the Novgorod Republic is signed, regulating the border for the first time.

  Date unknown

• Lithuania: In the Letters of Gediminas, Vilnius is named as the capital city.
• Remains of the Lighthouse of Alexandria are toppled by the third of a series of earthquakes.
• A conflict between Ingeborg of Norway, and the regencies of her son in Sweden and Norway, ends with the diminution of her power.

  Births

• February 9 - Margaret of Brabant, Countess of Flanders
• Charles, Duke of Durazzo, Neapolitan noble
• Bernabò Visconti, Lord of Milan, Italian soldier and statesman
• Latest likely date - Constanza Manuel, queen consort of Castile

  Deaths

• March 3 - Andrew Harclay, 1st Earl of Carlisle, English military leader
• August - Isabella of Burgundy, Queen of Germany
• September 4 - Gegeen Khan, Emperor Yingzong of Yuan
• October 16 - Amadeus V, Count of Savoy
• date unknown
• * King Andrew of Galicia, with his brother Leo II
• * King Leo II of Galicia, with his brother Andrew