1280

Events 
 Construction on the northern section of the Grand Canal of China begins.
 The final stage of the Lincoln Cathedral is completed.
 King Edward I of England forms the Court of King's Bench. The Bench hears petitions for justice instead of the king hearing them himself.
 The Wolf minimum of solar activity begins (approximate date).
 The Asen dynasty of tsars of Bulgaria ends.
 Syria tries to leave from the Mamluk sultanate of Egypt. Qalawun defeats the rebels and keeps Syria in the Egyptian sultanate.
 The second of two main surveys of the Hundred Rolls is completed. It began in 1279.
 Turin is conquered by Thomas III of Savoy. It becomes the capital of the House of Savoy.
 Osman starts to rule.

 Births 
 Birger of Sweden (d. 1321)
 Wu Zhen, Chinese painter (d. 1354)

 Deaths 
 May 9 – Magnus VI of Norway
 August 22 – Pope Nicholas III (b. 1218)
 November 15 – Albertus Magnus, German theologian