Year 1331 (MCCCXXXI) was a common year starting on Tuesday of the Julian calendar.
Events
September–December
- September 8 – Stefan Dušan declares himself king of Serbia.
- September 27 – Battle of Płowce: The German Teutonic Knights and the Poles battle to a draw.
Date unknown
- The Sieges of Cividale del Friuli and Alicante begin.
- The Genkō War begins in Japan.
- Ibn Battuta visits Kilwa.
- The first recorded outbreak of the Black Death occurs, in the Chinese province of Hebei.
Births
- February 16 – Coluccio Salutati, Florentine political leader (d. 1406)
- April 14 – Jeanne-Marie de Maille, French Roman Catholic saint (b. 1414)
- April 30 – Gaston III, Count of Foix (d. 1391)
- October 4 – James Butler, 2nd Earl of Ormonde (d. 1382)
- date unknown
- Hamidüddin Aksarayî, Ottoman teacher of Islam (d. 1412)
- Blanche d'Évreux, queen consort of France (d. 1398)
- Michael Palaiologos, Byzantine prince
- probable – Salvestro de' Medici, provost of Florence (d. 1388)
Deaths
- January 14 – Odoric of Pordenone, Italian missionary friar and explorer (b. c. 1280)
- April 17 – Robert de Vere, 6th Earl of Oxford, English noble and soldier (b. c. 1257)
- May 12 – Engelbert of Admont, abbot in Styria
- October 27 – Abulfeda, Kurdish Syrian historian and geographer (b. 1273)
- November 11 – King Stefan Uroš III Dečanski of Serbia (b. c. 1285)
- December 26 – Philip I, Prince of Taranto, titular Latin Emperor (b. 1278)
- December 30 – Bernard Gui, French inquisitor (b. 1261 or 1262)
- date unknown – Matilda of Hainaut, Princess of Achaea (b. 1293)