1271

Events 
 Europe 
 July 2 – Kings Otakar II of Bohemia and Stephen V of Hungary sign the first Peace of Pressburg, settling territorial claims following the failed invasion of Hungary by Otakar II.
 September 1 – Pope Gregory X succeeds Pope Clement IV as the 184th popeas the compromise candidate between French and Italian cardinals, ending a three-year conclave, the longest ever.
 The County of Toulouse is returned to the crown of France.
 Marco Polo departs from Venice with his father and uncle on his famous journey to Kublai Khan's China.
 The construction of Caerphilly Castle, the largest in Wales, is completed.
 Construction of the Belaya Vezha in Belarus is begun.

 North Africa and the Middle East 
 April 8 – Mamluk sultan Baibars continues his territorial expansion, capturing the strategically important castle Krak des Chevaliers from the Knights Hospitaller in present-day Syria.
 Mamluk sultan Baibars conducts an unsuccessful siege of the city of Tripoli, and also fails in an attempted naval invasion of Cyprus.
 Edward I of England and Charles of Anjou arrive in Acre, starting the Ninth Crusade against Baibars; however, they are unable to capture any territory and a peace is quickly negotiated.

 Asia 
 September 12 – According to the followers of Nichiren Buddhism, the sect's founder, Nichiren, reaches a turning point known as hosshaku kempon as he discards his identity as a mortal priest and begins to reveal himself as a reincarnation of the Buddha.
 December 18 – Kublai Khan renames his empire "Yuan" (元 yuán), officially marking the start of the Yuan Dynasty of China.
 The Nakhi kingdom of the northern Himalayan foothills is annexed by the Yuan Dynasty.

 Births 
 May 25 – Shah Jalal of Bengal (d. 1346)
 May – Joan of Acre, daughter of King Edward I of England (d. 1307)

Category:1271