1337

Events

March 16 – Edward, the Black Prince establishes the Duchy of Cornwall, becoming the first English Duke.{{cite book|title=Penguin Pocket On This Day|publisher=Penguin Reference Library|isbn=0-14-102715-0|year=2006}}
May 24 – Philip VI of France confiscates Gascony from English control.{{cite book|last=Palmer|first=Alan|last2=Palmer |first2=Veronica|year=1992|title=The Chronology of British History|publisher=Century Ltd|location=London|pages=100–102|isbn=0-7126-5616-2}}
August – Second War of Scottish Independence: English forces relieve Stirling Castle, ending Edward III of England's last campaign in Scotland.
October – Hundred Years' War: Edward III of England formally rejects Philip VI's claim to the French throne, initiating hostilities between France and England.{{cite book|last=Williams|first=Hywel|title=Cassell's Chronology of World History|url=https://archive.org/details/cassellschronolo0000will|url-access=registration|location=London|publisher=Weidenfeld & Nicolson|year=2005|isbn=0-304-35730-8|pages=[https://archive.org/details/cassellschronolo0000will/page/159 159–161]}}
November – Battle of Cadzand: English troops raid the Flemish island of Cadzand.

Bisham Priory is founded in England.
The Scaligeri Family loses control of Padua; Alberto della Scala, patron of the music of the Trecento, moves to Verona.
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.
The Sofia Psalter is produced in Bulgaria.
The Despotate of Epirus is conquered by the Byzantine Empire.
The famine in China, which had lasted since 1332 and killed 6,000,000, comes to an end.
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.

February 25 – Wenceslaus I, Duke of Luxembourg, Czech Duke of Luxembourg (d. 1383)
date unknown
Louis II, Duke of Bourbon (d. 1410)
Jean Froissart, historian and courtier from Hainaut (d. 1405)
Bianca of Savoy, lady consort of Milan (d. 1387)
Chŏng Mong-ju, Goryeo diplomat and poet (d. 1392)
Robert III of Scotland, second monarch from the House of Stewart to rule Scotland (d. 1406)

January 8 – Giotto di Bondone, Italian painter (b. 1267)
June 7 – William I, Count of Hainaut (b. 1286)
June 15 – Angelo da Clareno, Italian Franciscan and leader of a group of Fraticelli (b. 1247)
June 25 – Frederick III of Sicily (b. 1272)
June 30 – Eleanor de Clare, politically active English noble (b. 1290)
date unknown
Changshi, khan of the Chagatai Khanate
William Frangipani, Latin Archbishop of Patras
Musa I of Mali, ruler of the Malian Empire (b. c.1280)
Prince Narinaga, Japanese Shōgun (b. 1326, d. either 1337 or 1344, the sources are contradictory)