1280

1280 (MCCLXXX) was a leap year starting on Monday of the Julian calendar, the 1280th year of the Common Era (CE) and Anno Domini (AD) designations, the 280th year of the 2nd millennium, the 80th year of the 13th century, and the 1st year of the 1280s decade. As of the start of 1280, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	2nd millennium
Centuries:	12th century – 13th century – 14th century
Decades:	1250s  1260s  1270s  – 1280s –  1290s  1300s  1310s
Years:	1277 1278 1279 – 1280 – 1281 1282 1283

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