1277

Events

• Battle of Ngasaunggyan: Burma's Pagan Empire begins to disintegrate after being defeated by Kublai Khan at Yunnan near the Chinese border.
• Some 50,000 leaders and citizens of the Southern Song Dynasty of China become the first recorded inhabitants of Macau, as they seek refuge from the invading Mongol Empire. They also stay for a short period in Kowloon. Some hundred years later the place where they stayed becomes Sung Wong Toi.
• April 15 - Battle of Elbistan: Mamluk sultan Baibars invades the Seljuk Sultanate of Rûm and defeats a Mongol army.
• Llywelyn ap Gruffyd is subdued by King Edward I of England in the First Welsh War.
• St George's cross is first used as the flag of England.
• The philosophical doctrine Averroism is banned from Paris at a condemnation at the University of Paris.
• In Japan, a 20 kilometer stone wall defending the coast of Hakata Bay in Fukuoka is completed; it is built in response to the attempted invasion by the Mongol Empire in 1274.
• November 25 - Pope Nicholas III succeeds Pope John XXI as the 188th pope.

Births

• Sempad of Armenia (d. c. 1310)
• Isabella of Mar, first wife of Robert Bruce (approximate date; d. 1296)

Deaths

• May 1 - Stefan Uros I of Serbia
• May 20 - Pope John XXI (b. 1215)
• July 1 - Baibars, Mameluk sultan of Egypt (b. 1223)
• October 27 - Walter de Merton, Lord Chancellor of England and founder of Merton College, Oxford
• Folke Johansson Ängel, Archbishop of Uppsala