1337 CE
Edward the Black Prince establishes the Duchy of Cornwall, becoming the first English Duke. Second War of Scottish Independence: English forces relieve Stirling Castle, ending Edward III of England's last campaign in Scotland. Battle of Cadzand: English troops raid the Flemish island of Cadzand.
Geopolitics & Diplomacy
- March 16 – Edward the Black Prince establishes the Duchy of Cornwall, becoming the first English Duke.source
Conflict & Security
- May 24 – Philip VI of France confiscates Gascony from English control.source
- August – Second War of Scottish Independence: English forces relieve Stirling Castle, ending Edward III of England's last campaign in Scotland.source
- October – Hundred Years' War: Edward III of England formally rejects Philip VI's claim to the French throne, initiating hostilities between France and England.source
- November – Battle of Cadzand: English troops raid the Flemish island of Cadzand.source
- The Despotate of Epirus is conquered by the Byzantine Empire.source
- The Scaligeri Family loses control of Padua; Alberto della Scala, patron of the music of the Trecento, moves to Verona.source
- Siege of Nicomedia: After its foundation by Osman I in about 1299, the Ottoman Empire expanded across Bithynia in north-west Anatolia by capturing territory from the Byzantine Empire.source
Religion & Belief
Science & Discovery
- Petrarch, "father" of Renaissance humanism, first visits Rome to wander its mysterious ruins, with an eye for aesthetics as well as for history, exciting a renewed interest in Classical civilisation.source
Climate & Environment
- The famine in China, which had lasted since 1332 and killed 6,000,000, comes to an end.source
Births
- February 25 – Wenceslaus I, Duke of Luxembourg, Czech Duke of Luxembourg (d. 1383)source
- Louis II, Duke of Bourbon (d. 1410)source
- Jean Froissart, historian and courtier from Hainaut (d. 1405)source
- Chŏng Mong-ju, Goryeo diplomat and poet (d. 1392)source
- Robert III of Scotland, second monarch from the House of Stewart to rule Scotland (d. 1406)source
- Bianca of Savoy, lady consort of Milan (d. 1387)source
Deaths
- January 8 – Giotto, Italian painter (b. 1267)source
- June 7 – William I, Count of Hainaut (b. 1286)source
- June 15 – Angelo da Clareno, Italian Franciscan and leader of a group of Fraticelli (b. 1247)source
- June 25 – Frederick III of Sicily (b. 1272)source
- June 30 – Eleanor de Clare, politically active English noble (b. 1290)source
- William Frangipani, Latin Archbishop of Patrassource
- Musa I of Mali, ruler of the Malian Empire (b. c.1280)source
- Prince Narinaga, Japanese Shōgun (b. 1326, d. either 1337 or 1344, the sources are contradictory)source
- Changshi, khan of the Chagatai Khanatesource