The 1200s

1200 CE36 entries

• May 22 – The Kings John of England and Philip II of France, sign a peace treaty at Le Goulet, an island in the middle of the Seine River, near Vernon in Normandy. The agreement recognizes John as overlord of most of the English owned lands in France, but John has to give Philip the lands of Norman Vexin and Évreux and a large sum of money (some 20,000 marks) – a "relief" payment for recognition of John's sovereignty of Brittany.
• August 25 – Eager to make peace with Aymer Taillefer, count of Angoulême, John marries 15-year-old Isabella of Angoulême at Bordeaux. In order to remarry, John needs to abandon his first wife, Isabella of Gloucester. John accomplishes this by arguing that he has failed to get the necessary papal dispensation to marry Isabella of Gloucester.
• November 22 – During a tour of the Midlands, John receives homage from William the Lion, king of Scotland, at Lincoln. William is looking to move into the areas of Northumberland, Cumberland, and Westmoreland. John on the other hand ensures that these areas are controlled by English nobles he can trust.

1201 CE34 entries

• March 25 – Constance, duchess of Brittany, founds Villeneuve Abbey and gives it a charter.
• April 10 – John, King of England, permits Jews to live freely in England and Normandy.
• July 11 – Llywelyn the Great pays homage to John, King of England after Llywelyn has added Eifionydd and Llŷn to his kingdom of Gwynedd in north Wales.

1202 CE38 entries

• May 20 – An earthquake shakes the Levant from Egypt to northern Iraq, causing severe damage in Palestine, Lebanon and western Syria, including the fortifications of the Crusader cities of Acre, Jaffa and Tyre.
• August 1 – Battle of Mirebeau: Arthur of Brittany, supported by the Lusignans, lays siege to Mirebeau Castle trapping Eleanor of Aquitaine inside. John launches a rescue mission to free his mother, and with a mercenary army defeats the Breton-Lusignan forces. Arthur is captured by William de Braose and is handed over to John who imprisons him in the Château de Falaise in Normandy. Many other important knights are captured and shipped to England (where John treats them badly and keeps them as prisoners in dungeons).
• November 10–24 – Siege of Zara: The Crusaders under Boniface of Montferrat besiege and conquer Zara (modern-day Zadar) in Dalmatia. Despite letters from Innocent III forbidding such an action, and threatening excommunication. The leading citizens of Zara hang banners of crosses along the outer walls, professing their Catholic faith. Nevertheless, the Crusaders breach and sack the city, killing many.

1203 CE53 entries

1204 CE32 entries

• February 21–23 – A large solar storm takes place, and is recorded in Meigetsuki, the diary of the Japanese poet Fujiwara no Sadaie.
• April 12 – Sack of Constantinople: Crusaders enter Constantinople by storm and start pillaging the city as part of the Fourth Crusade. Forces of the Republic of Venice seize the antique statues that will become the horses of Saint Mark.
• May 16 – Baldwin, Count of Flanders, is crowned emperor of the Latin Empire a week after his election by the members of the Fourth Crusade.

1205 CE35 entries

• April 1 – Aimery of Cyprus, king of Jerusalem, dies of food poisoning caused by white mullet. He is succeeded by his 9-year-old son Hugh I as ruler of Cyprus. His mother, Queen Isabella I becomes regent over the young boy, but she dies suddenly four days after her husband. The High Court of Cyprus appoints Walter of Montbéliard (brother-in-law of Aimery) as regent and Hugh's guardian.
• April 14 – Battle of Adrianople: Latin forces under Baldwin I are defeated and eliminated in a successful ambush by Bulgarians, Vlachs and Cumans. Baldwin is captured and taken as prisoner to Veliko Tarnovo – where he is locked up at the top of a tower in the Tsarevets fortress. Later, Baldwin is possibly executed by orders of Kaloyan (this according to the Byzantine historian George Akropolites).
• June 19 – Battle of Zawichost: Polish forces under High Duke Leszek the White defeat the Kievan army at Zawichost. During the ambush, Roman Mstislavich, Grand Prince of Kiev, is killed. He is succeeded by his two infant sons, Daniel and Vasilko. Their principalities are ruled by their mother Anna of Byzantium, but the boyars of Galicia–Volhynia forces her and the young princes into exile.

1206 CE33 entries

• February – The Bulgarians attack and loot the fortified town of Rodosto (see Battle of Rodosto), defended by a Venetian garrison. Later, Kaloyan captures many more towns and fortresses.
• March 15 – Sultan Muhammad of Ghor is murdered and succeeded by Qutb al-Din Aibak, his deputy in India, who founds the Mamluk Dynasty, the first dynasty of the Delhi Sultanate.
• December – The monks of Canterbury want their own sub-prior Reginald for the post of archbishop, while King John chooses John de Gray. Pope Innocent III appoints Stephen Langton. Finally, the monks accept the Pope's decision and vote for Langton.

1207 CE42 entries

• May 24 – John still refuses to accept Stephen Langton as archbishop; Innocent III threatens to place England under an Interdict. In response, John confiscates church property. Many of the English bishops of the great churches in the country flee abroad to the Continent.
• November – Leeds, a market town in West Yorkshire, receives its first charter (approximate date).
• Hōnen and his followers of the Pure Land sect are persecuted and exiled to remote parts of Japan, while a few are executed, for what the government considers heretical Buddhist teachings.

1208 CE37 entries

• January 31 – Battle of Lena: Swedish forces under Erik Knutsson defeat the invading Danish army (some 12,000 men). King Sverker the Younger is deposed as king of Sweden and is succeeded by Erik.
• April 15 – A fire breaks out in the Song Chinese capital city of Hangzhou, raging for four days and nights, destroying 58,097 houses over an area of more than 3 mi km, killing 59 people, and an unrecorded number of other people, who are trampled while attempting to flee. The government provides temporary lodging for 5,345 people, in nearby Buddhist and Taoist monasteries. The collective victims of the disaster are given 160,000 strings of cash, along with 400 tons of rice. Some of the government officials who lose their homes take up residence in rented boathouses on the nearby West Lake.
• June 30 – Battle of Philippopolis: Bulgarian forces under Emperor (tsar) Boril are defeated by the Latin army (some 30,000 men) led by Emperor Henry of Flanders, near modern-day Plovdiv, Bulgaria.

1209 CE40 entries

• June – Treaty of Sapienza: The Republic of Venice recognizes the possession of the Peloponnese by Geoffrey I of Villehardouin and keeps only the fortresses of Modon and Coron. Venice also acquires an exemption of her merchants from all tariffs, and the right to establish "a church, a market and a court" in every city of Achaea.
• July 22 – Massacre at Béziers: The Crusader army, led by Simon de Monfort, arrives in the Languedoc area, and makes camp at Béziers, to start a siege. The citizens, believing that their city walls are impregnable, harass the Crusaders, by sending a group of soldiers (supported by armed civilians) to launch a sortie against their camp. When they are forced to retreat, the Crusaders storm the walls (which are not properly manned) and enter the gate, sacking and killing some 20,000 Cathars and Catholics alike.
• November – Against the backdrop of the continuing Papal Interdict of 1208, John, King of England, is excommunicated by Pope Innocent III. Despite the excommunication, John will continue to make amends to the Church – including giving alms to the poor whenever he defiles a holy day by hunting during it. He feeds 100 paupers to make up for when he "went into the woods on the feast of St. Mary Magdalen", and three years from now, he will feast 450 paupers "because the king went to take cranes, and he took nine, for each of which he feasted fifty paupers."