Year 1289 (MCCLXXXIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.
The 5,453 meter (17,887 feet) high volcano Popocatépetl is first ascended by members of the Tecuanipas tribe in present-day Mexico.
April 27 – Fall of Tripoli: Mamluk sultan Qalawun captures the County of Tripoli (in present-day Lebanon) after a month-long siege, thus extinguishing the crusader state.
Prince Subaru of Japan conquers the province of Saitama.
June 11 – The Italian Guelph and Ghibelline factions fight in the Battle of Campaldino; the Guelph victory secures their position of power in Florence.
Construction of Conwy Castle, ordered by King Edward I of England, is completed in Wales.
Jews are expelled from Gascony and Anjou in France.
Construction of the Belaya Vezha tower in Belarus is completed.
Pope Nicholas IV formally constitutes the University of Montpellier in France by papal bull, combining various existing schools under the mantle of a single university.
In Siena, twenty three partners, including five members of the Bonsignori family, re-create the Gran Tavola, formerly the most successful European bank, which had ceased its operations after the death of its creator and manager Orlando Bonsignori in 1273.
Religion
Franciscan friars begin missionary work in China.
October 4 – King Louis X of France (d. 1316)
October 6 – King Wenceslaus III of Bohemia (d. 1306)
January 16 – Buqa, Mongol minister
March 12 – King Demetrius II of Georgia (b. 1259)
King Leo III of Armenia
Petrus de Dacia, Swedish monk and author
Ugolino della Gherardesca
Ippen, Japanese monk (b. 1239)
Gruffydd Fychan I, last ruling prince of Powys Fadog
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