Events

• January 6 – Archbishop Jakub Świnka orders all priests subject to his bishopry in Poland to deliver sermons in Polish rather than German, thus further unifying the Catholic Church in Poland and fostering a national identity.

• April 2 – Pope Honorius IV succeeds Pope Martin IV as the 190th pope.

• April 25 – Mamluk sultan Qalawun begins a siege of the Crusader fortress of Margat (in present-day Syria), a major stronghold of the Knights Hospitaller thought to be impregnable; he captures the fortress a month later.

• September 4 – Roger of Lauria defeats King Philip III of France in a naval battle off of Barcelona.

• The writ Circumspecte Agatis, issued by King Edward I of England, defines the jurisdictions of church and state in England, thereby limiting the church's judicial powers to ecclesiastical cases only.

• The Second Statute of Westminster is passed in England, reforming various laws; it includes the famous clause de donis conditionalibus, considered one of the fundamental institutes of medieval law in England.

• The English romantic poem The Lay of Havelok the Dane is written (approximate date).

• Tran Hung Dao leads Vietnamese forces in victory over an invading Mongol army of the Yuan dynasty.

• Mansa Sakura usurps the throne of the Mali Empire

Births

• March 9 – Emperor Go-Nijo of Japan (d. 1308)

• May 1 – Edmund FitzAlan, 9th Earl of Arundel, English politician (d. 1326)

• December 6 – King Ferdinand IV of Castile (d. 1312)

• Al-Nasr Muhammad, sultan of Egypt (d. 1341)

• Ziauddin Barani, historian and political thinker of the Delhi Sultanate (d. 1357)

• Patrick Dunbar, 9th Earl of Dunbar (d. 1369)

Deaths

• March 24 – Daumantas, Grand Prince of Lithuania

• March 28 – Pope Martin IV

• May 13 – Robert de Ros, 1st Baron de Ros

• May 20 – John II of Jerusalem, King of Cyprus (b. 1259)

• October 5 – King Philip III of France (b. 1245)

• November 11 – King Peter III of Aragon (b. 1239)

• Tile Kolup, German imposter

• Philip I of Savoy (b. 1207)

• Rutebeuf, French troubadour

• King Charles I of Sicily (b. 1227)