1243 CE
Treaty of Bordeaux: King Louis IX (the Saint) and King Henry III agree to a truce that ends the Saintonge War. The truce does not stop the on-going clashes (and further tensions) between France and England. A Crusader force under Balian III, lord of Beirut, captures Tyre after a long siege. The barons seize the citadel on July 10, with the help of Alice, queen of Cyprus, whose forces arrive on June 15. This ending the War of the Lombards. Battle of Köse Dağ: The Mongols under Baiju Noyan defeat the Seljuk Turks of the Sultanate of Rum and their Byzantine allies. The Seljuks and the Empire of Trebizond become vassals of the Mongols.
Geopolitics & Diplomacy
- March – King Ferdinand III (the Saint) turns the independent Taifa of Murcia into a protectorate, and initiates the process of the colonization and Christianization of the region. He receives the submission of the Moors, under the terms of a peace agreement (the famous Treaty of Alcaraz).source
- April 27 – Treaty of Bordeaux: King Louis IX (the Saint) and King Henry III agree to a truce that ends the Saintonge War. The truce does not stop the on-going clashes (and further tensions) between France and England.source
Conflict & Security
- May 1 – The Castillan troops are garrisoned in Murcia, to support the Hudid Dynasty.source
- June 12 – A Crusader force under Balian III, lord of Beirut, captures Tyre after a long siege. The barons seize the citadel on July 10, with the help of Alice, queen of Cyprus, whose forces arrive on June 15. This ending the War of the Lombards.source
- June 26 – Battle of Köse Dağ: The Mongols under Baiju Noyan defeat the Seljuk Turks of the Sultanate of Rum and their Byzantine allies. The Seljuks and the Empire of Trebizond become vassals of the Mongols.source
- Siege of Montségur: French forces (some 10,000 men) begin the siege of Château de Montségur to raze the stronghold held by the rebellious Cathars. The castle is defended by some 100 troops and 500 refugees.source
- Siege of Viterbo: Emperor Frederick II besieges Viterbo on request of the rebel citizens. The defenders are able to set fire to the siege towers and after signing a peace treaty, Frederick is persuaded to withdraw his army.source
Religion & Belief
- June 25 – Pope Innocent IV succeeds Celestine IV as the 180th pope of the Catholic Church, after a sede vacante of 7 months.source
Culture & Society
- Spring – Henry III bestows the custody of Kenilworth Castle to Simon de Montfort. Simon's wife Eleanor, Henry's sister, already owned Odiham Castle (or King John's Castle) so Simon has two of the strongest fortresses in England under his control.source
Births
- May 31 – James II, Aragonese ruler of Majorca (d. 1311)source
- June 6 – Alix of Brittany, Breton noblewoman (d. 1288)source
- June 28 – Go-Fukakusa, emperor of Japan (d. 1304)source
- September 2 – Walter Langton, bishop of Coventry (d. 1321)source
- September 2 – Gilbert de Clare, English nobleman (d. 1295)source
- Roger Bernard III, French nobleman and poet (d. 1302)source
- Augustinus Triumphus, Italian hermit and writer (d. 1328)source
- Zhenjin (or Chingkim), Mongolian prince (d. 1286)source
- Riccoldo da Monte di Croce, Italian missionary (d. 1320)source
- Giles of Rome, Italian friar and archbishop (d. 1316)source
- Awaji Nichiken, Japanese Buddhist monk (d. 1338)source
- Alfonso Fernández el Niño, Spanish nobleman (d. 1281)source
- An Hyang (or Ahn Yu), Korean Confucian scholar (d. 1306)source
- John I of Chalon-Auxerre, French nobleman (d. 1309)source
Deaths
- January 17 – Herman V, German nobleman (b. 1180)source
- January 19 – Konoe Iezane, Japanese nobleman (b. 1179)source
- February 20 – Romano Bonaventura, Italian cardinalsource
- March 10 – Cyril III, patriarch of Alexandria (b. 1175)source
- April 25 – Boniface of Valperga, Italian monk and bishopsource
- May 3 – Hawise of Chester, English noblewoman (b. 1180)source
- May 4 – Hubert de Burgh, Earl of Kent, English Chief Justiciar (b. 1170)source
- May 7 – Hugh d'Aubigny, English nobleman and knightsource
- June 4 – Constance, margravine of Meissen (b. 1212)source
- June 26 – Dardin Shervashidze, Georgian noblemansource
- August 16 – Stepan Tverdislavich, Russian posadniksource
- October 15 – Hedwig of Silesia, Polish duchess (b. 1174)source
- October 26 – Bernat Calbó (or Calvó), Catalan bishopsource
- Indravarman II, Cambodian ruler of the Khmer Empiresource