1267 CE
Kings Afonso III of Portugal and Alfonso X of Castile sign the Badajoz Convention, determining the border between the Kingdom of Portugal and the Kingdom of León and ensuring Portuguese sovereignty over Algarve. Treaty of Viterbo: Emperor Baldwin II of Constantinople gifts the Principality of Achaea to King Charles I of Sicily, in the hope that Charles can help him restore the Latin Empire. In England, the Statute of Marlborough is passed, the oldest English law still (partially) in force.
Geopolitics & Diplomacy
- February 16 – Kings Afonso III of Portugal and Alfonso X of Castile sign the Badajoz Convention, determining the border between the Kingdom of Portugal and the Kingdom of León and ensuring Portuguese sovereignty over Algarve.source
- May 27 – Treaty of Viterbo: Emperor Baldwin II of Constantinople gifts the Principality of Achaea to King Charles I of Sicily, in the hope that Charles can help him restore the Latin Empire.source
- September 29 – Treaty of Montgomery: King Henry III of England acknowledges Llywelyn ap Gruffudd's title of Prince of Wales.source
- November 18 – In England, the Statute of Marlborough is passed, the oldest English law still (partially) in force.source
- Malik ul Salih establishes Samudra Pasai, the first Muslim state in Indonesia.source
Conflict & Security
- Spain attempts an invasion of Morocco, but the Muslim empire Marinid Sultanate successfully defend against the invasion, and drive out Spanish forces.source
- by Summer – The Second Barons' War in England ends as the rebels and King Henry III of England accept the peace terms laid out in the Dictum of Kenilworth (1266).source
Technology & Infrastructure
- The "Grand Capital" is constructed in Khanbaliq (modern-day Beijing) by Kublai Khan, having moved the capital of the Mongol Empire there three years prior.source
Science & Discovery
- The city of Ostrava in Moravia is first recorded.source
Culture & Society
- The leadership of Vienna forces Jews to wear the Pileum cornutum, a cone-shaped head dress, in addition to the yellow badges Jews are already forced to wear.source
Births
- February 3 (or February 3, 1266) – Richard FitzAlan, 8th Earl of Arundel (d. 1302)source
- August 10 – King James II of Aragon (d. 1327)source
- Giotto, Italian artist who marked the shift from medieval art to Proto-Renaissance art. (d. 1337)source
- Roger de Flor, Sicilian military adventurer, leader of the mercenary group Catalan Companysource
Deaths
- February 21 – Baldwin of Ibelin, Seneschal of Cyprussource
- March 3 or 4 – Lars, Archbishop of Uppsalasource
- March 17 – Peter of Montereau, French architect (b. c. 1200)source
- September 23 – Beatrice of Provence, countess regnant of Provence (b. 1234)source
- November 19 – Pedro Gallego, Franciscan scholar and translatorsource
- November 26 – Sylvester Gozzolini, Italian founder of the Sylvestrines (b. 1177)source
- November/December – Hugh II of Cyprus, king of Cyprus and regent of the Kingdom of Jerusalem. (b. 1253)source
- date unknown – John FitzAlan, 6th Earl of Arundel, Breton-English nobleman and Marcher Lord (b. 1223)source