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The 1240s

382 sourced entries across 10 years, inside the 13th century. Each year below opens its own page; the lines under it are that year’s highest-ranked entries.

1240 CE39 entries

  • May 24 – Duke Skule Bårdsson, claimant to the Norwegian throne, is defeated by King Haakon IV ("the Old") and his supporters. He seeks refuge in Elgeseter Priory in Trondheim, and Haakon burns down the monastery, in which Skule is burned alive. Haakon becomes the undisputed ruler; this ends the civil war era in Norway, after 110 years.
  • June 12 – The Disputation of Paris begins at the court of King Louis IX ("the Saint"), where four rabbis defend the Talmud against Nicholas Donin's accusations of blasphemy.
  • August – Siege of Faenza: Frederick II lays siege to the town of Faenza during the war of the Guelphs and Ghibellines. Meanwhile, Frederick makes an alliance with Pisa to support his campaign against the Papal States.

1241 CE29 entries

  • March 18 – Battle of Chmielnik (Mongol invasion of Poland): The Mongols overwhelm the feudal Polish armies of Sandomierz and Kraków provinces, and plunder the abandoned city of Kraków.
  • April 11 – Battle of Mohi: Batu Khan and Subutai defeat Béla IV of Hungary. The battle is the last major event in the Mongol Invasion of Europe.
  • May – Battle of Giglio: an Imperial fleet defeats a Genoan fleet in the Tyrrhenian Sea.

1242 CE44 entries

  • April 5 – Battle of Lake Peipus (or Battle on the Ice): Russian forces led by Alexander Nevsky, rebuff an invasion attempt by a Crusader army (some 2,600 men), including German Teutonic Knights. The opposing armies meet upon the frozen surface of Lake Peipus. The outnumbered Teutonic Knights are defeated on the slippery surface, by Alexander's elite druzhina and the Novgorod forces.
  • May 28 – Avignonet massacre: A group of Cathars, with the probable connivance of Count Raymond VII of Toulouse, murder the inquisitor William Arnaud and eleven of his companions.
  • November 16 – King Béla IV issues the Golden Bull to the inhabitants of Gradec (modern-day Zagreb) and Samobor in Croatia. By this golden bull, Béla proclaimes Gradec a royal free city.

1243 CE37 entries

  • 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.
  • 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.
  • 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.

1244 CE39 entries

  • June 7 – Pope Innocent IV is driven from Rome by imperial forces of Emperor Frederick II, and travels secretly in disguise to Sutri. Genoese galleys prepared by his relatives are waiting for him at the port of Civitavecchia to take him to Genoa.
  • June – Khwarazmian forces (some 10,000 men) invade Syrian territory, ravaging the land and burning the villages. As Damascus is too strong for a siege, they attack Galilee, past the town of Tiberias – which they capture. The Khwarazmians attack further southward through Nablus towards Jerusalem.
  • July 15 – Siege of Jerusalem: Khwarazmian horsemen attack and sack the 'holy city' of Jerusalem. There is bloody fighting in the streets. The Khwarazmian force their way into the Armenian Quarter, where they decimate the Christian population, and drive out the Jews. The city is left in a state of ruin.

1245 CE35 entries

  • February 21 – Thomas, bishop of Turku (modern Finland), is granted resignation by Pope Innocent IV. He admits to committing several felonies, such as torturing and forging a papal letter.
  • April 16 – Innocent IV sends Giovanni da Pian del Carpine (accompanied by Stephen of Bohemia) to the Mongol court at Karakorum, suggesting that the Mongols convert to Christianity.
  • April – Egyptian forces under As-Salih Ayyub besiege the city of Damascus. After six months, As-Salih Ismail, ruler of Damascus, surrenders to Ayyub in return for a vassal-principality, consisting of Baalbek and the Hauran. Ayyub is awarded the title of sultan by Caliph Al-Musta'sim in Baghdad.

1246 CE41 entries

  • August 24 – Güyük Khan, eldest son of Ögedei Khan, is enthroned as the 3rd Great Khan of the Mongol Empire (which is witnessed by a papal mission under Giovanni da Pian del Carpine) at Karakorum. Güyük reverses several edicts of his mother, Töregene Khatun, and orders Eljigidei, Mongol viceroy of Persia, to advance into Syria and prepare an attack on Baghdad.
  • 2 October – Damascus falls to the Ayyubid vizier Mu'in al-Din Hasan ibn al-Shaykh after a siege of some four months.
  • November – Michael II Asen, ruler (tsar) of the Bulgarian Empire, succeeds his brother Kaliman I (possibly poisoned). He confirms the reconquest of Bulgarian territories against John III (Doukas Vatatzes), Byzantine ruler of the Empire of Nicaea.

1247 CE37 entries

  • July 2 – King Béla IV grants territories to the Knights Hospitaller in the Banate of Severin and Hungarian Cumania (according to a document called the Diploma of the Joannites), makes an early mention of Litovoi and other Vlach/Romanian local rulers, in Wallachia and Transylvania.
  • December 1 – A rebellion arises among the Muslim subjects in the region of Valencia. As a punishment, King James I of Aragon ("the Conqueror"), issues an order of expulsion of the Muslims from his realm, leading numerous people into exile in Andalusia and North Africa.
  • The Bethlem Royal Hospital is founded in London during the reign of King Henry III.

1248 CE38 entries

  • February 18 – Battle of Parma: Imperial forces (some 6,000 men) under Emperor Frederick II are defeated by the Lombard League at Parma. Much of Frederick's treasure is lost, while he is hunting in the Taro Valley.
  • April 26 – The Gothic chapel Sainte-Chapelle (Holy Chapel) is completed and consecrated in Paris. Louis IX moves the relics of the True Cross and Holy Lance to the chapel with great ceremony.
  • August 25 – The Dutch city of Ommen receives city rights and fortification rights from Otto III, archbishop of Utrecht, after the town has been pillaged by a local robber baron.

1249 CE43 entries

  • May – Nicaean–Latin Wars: Latin forces led by William of Villehardouin, arrive on the island of Rhodes on their way to join the Seventh Crusade. This causes the Nicaeans to raise the siege of Rhodes. William concludes an agreement with the Genoese and leaves behind some 100 knights before departing for the Holy Land.
  • August 15 – First Battle of Athenry: Gaelic forces of Connacht besiege Athenry Castle in County Galway in Ireland, but are repelled by the Normans under Jordan de Exeter, Sheriff of Connacht.
  • Reconquista: King Afonso III of Portugal ("the Boulonnais") recaptures Faro and Silves in the Algarve from the Almohads, thus completing the expulsion of the Moors from Portugal. The Almohads also lose possession of Alicante in Al-Andalus (modern Spain).