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|1291 by topic|
|Political entities - State leaders - Religious leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1291 in poetry|
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- Spring – Vandino and Ugolino Vivaldi set sail from Genoa with the goal of reaching India; they never return.
- May 10 – Scottish nobles recognize the authority of King Edward I of England, in mediating the resolution of the succession crisis, created by the death of King Alexander III of Scotland, five years earlier.
- The Swiss Confederation is formed by Uri, Schwyz, and Unterwalden (the "three forest cantons"), at Rütli, by the Federal Charter.
- Sancho IV of Castile captures Tarifa from the Moors.
- The Habsburgs acquire the Swiss city of Lucerne.
- Pope Nicholas IV confirms the independence of San Marino, via papal bull.
- All glassmakers in Venice are forced to move to the island of Murano, in order to contain the risk of fire, thus establishing the glass industry there.
- Klenová Castle is constructed in southern Bohemia, as part of a frontier defense system.
- King Andrew III of Hungary gives royal town privileges to Bratislava, the present-day capital of Slovakia.
- May 18 – Al-Ashraf Khalil of Egypt captures Acre, thus exterminating the Crusader Kingdom of Jerusalem (the final Christian landholding remaining from the Crusades), and ending the Ninth Crusade and effectively all Crusades, by eliminating the possibility of further attacks on the Holy Land (see Siege of Acre (1291)).
- The artificial Kunming Lake is constructed as a reservoir for Dadu, Yuan Dynasty, China, by famous engineer and astronomer Guo Shoujing.
- Emperor Kameyama of Japan establishes the Zen Buddhist temple of Nanzenji, in Kyoto.
- Four towns of the county of Holland (Dordrecht, Haarlem, Leiden and Alkmaar) and two of the county of Zeeland (Middelburg and Zierikzee) agree for the first time to collectively secure a loan by their sovereign, Floris V. This system gives important securities to the lenders, and allows the ruler to access the same low interest rates as the cities’ governments.
- February 8 – King Afonso IV of Portugal (d. 1357)
- October 31 – Philippe de Vitry, French composer (d. 1361)
- Pope Clement VI (d. 1352)
- Theodore I of Montferrat (d. 1338)
- Aimone of Savoy (d. 1343)
- Margareta Ebner, German nun (d. 1351)
- March 10 – Arghun, Mongol ruler in Persia
- May 20 – Sayyid Jalaluddin Surkh-Posh Bukhari, Bukharan Sufi saint
- June 18 – King Alfonso III of Aragon (b. 1265)
- June 25 or June 26 – Eleanor of Provence, queen consort of England (b. 1223)
- July 15 – Rudolf I of Germany, Holy Roman Emperor (b. 1218)
- Hong Dagu, Korean military leader (b. 1244)
- Talabuga, Mongol khan of the Blue Horde
- Tanḥum Yerushalmi, 13th Century Judeo-Arabic commentator, leader of the Egyptian Jewish Community
- Zuijderduijn, Jaco (2010). "The emergence of provincial debt in the county of Holland (thirteenth-sixteenth centuries)". European Review of Economic History. 14 (2).