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1215 in various calendars
Gregorian calendar	1215; MCCXV
Ab urbe condita	1968
Armenian calendar	664; ԹՎ ՈԿԴ
Assyrian calendar	5965
Balinese saka calendar	1136–1137
Bengali calendar	621–622
Berber calendar	2165
English Regnal year	16 Joh. 1 – 17 Joh. 1
Buddhist calendar	1759
Burmese calendar	577
Byzantine calendar	6723–6724
Chinese calendar	甲戌年 (Wood Dog); 3912 or 3705; — to —; 乙亥年 (Wood Pig); 3913 or 3706
Coptic calendar	931–932
Discordian calendar	2381
Ethiopian calendar	1207–1208
Hebrew calendar	4975–4976
Hindu calendars
- Vikram Samvat	1271–1272
- Shaka Samvat	1136–1137
- Kali Yuga	4315–4316
Holocene calendar	11215
Igbo calendar	215–216
Iranian calendar	593–594
Islamic calendar	611–612
Japanese calendar	Kenpō 3; (建保３年)
Javanese calendar	1123–1124
Julian calendar	1215; MCCXV
Korean calendar	3548
Minguo calendar	697 before ROC; 民前697年
Nanakshahi calendar	−253
Thai solar calendar	1757–1758
Tibetan calendar	阳木狗年; (male Wood-Dog); 1341 or 960 or 188; — to —; 阴木猪年; (female Wood-Pig); 1342 or 961 or 189

Millennium:	2nd millennium
Centuries:	12th century; 13th century ; 14th century;
Decades:	1190s; 1200s; 1210s ; 1220s; 1230s;
Years:	1212; 1213; 1214; 1215 ; 1216; 1217; 1218;

Year 1215 (MCCXV) was a common year starting on Thursday of the Julian calendar.

Events

By continent

Europe

January 8 – Simon de Montfort, 5th Earl of Leicester, is elected lord of Languedoc in a council at Montpellier (Southern France), after his campaign against the Cathar heretics during the Albigensian Crusade. The Crusaders capture Château de Castelnaud-la-Chapelle and enter Toulouse; the town pays an indemnity of 30,000 marks and is gifted to Montfort.^[1]
March 4 – King John of England ("Lackland"), hoping to gain the support of Pope Innocent III against the Barons, takes the oath to go on Crusade. By doing so, Innocent declares John to be his vassal and claims ownership of the whole kingdom (with political protection under church law).^[2] On April 1, Innocent sends a letter to the Barons, asking them to halt their actions against John.
May 5 – Robert Fitzwalter is elected by the Barons as their general, with the title of "Marshal of the Army of God and Holy Church". He solemnly renounces his homage to John of England and begins to siege Northampton Castle. While this fails, Robert consolidates his forces. He turns to Prince Louis of France, son and heir apparent of King Philip II for support.^[3]
May 17 – The gates to London are opened by supporters of the rebellious Barons. The houses of Jews are targeted for ransacking and burning. The rebels, under Robert Fitzwalter, call for the English nobles still on the side of King John to join them, and repair the walls. The Tower of London, held by John's supporters, is too well defended to fall into the hands of the rebels.
June 15 – A large number of barons, led by Stephen Langton, archbishop of Canterbury, meet King John of England on an island in the Thames at Runnymede. They force John to sign Magna Carta, a document that grants liberties to the "free men" – the Barons, the church and the towns. He is subjected to the rule of law, by confirming the status of trial by jury, on June 19.^[4]
Summer – Emperor Otto IV is excommunicated and forced to abdicate as ruler of the Holy Roman Empire. The German nobles, supported by Innocent III, again elect the 20-year-old Frederick II as King of the Romans who is crowned in Aachen, on July 25. The same day, Frederick takes the Cross and promises to go on Crusade.
August – King John of England rejects Magna Carta and writes to Innocent III – asking him to cancel the charter on grounds that he signed it against his will. At the same time, John continues to build up his mercenary army.
August 24 – Pope Innocent III annuls Magna Carta, freeing King John from its limitations. He annuls the charter on the grounds that John signed it because he is forced and that the document is illegal.
November 11–30 – The Fourth Council of the Lateran (or "Great Council") convened by Innocent III ends at Rome and approves the papal proposal for a Fifth Crusade in Palestine.^[5] The Pope promulgates a canon against clerical participation in trial by ordeal, replacing it by compurgation.^[6]
September 13 – King John of England seeks help from Innocent III in his fight against the Barons. In a letter, written while staying at Dover Castle, he states that the defense of England is the responsibility of God and the Pope.
October – The Barons offer the English crown to Louis of France and invite him to England. King John England confiscates the Barons' land and besieges Rochester Castle; the garrison is starved out and surrenders to him.
December – First Barons' War: King John of England campaigns successfully in the Midlands and captures Nottingham Castle, on December 24. King Alexander II of Scotland joins the Barons and invades Northern England.^[7]

Asia

June 1 – Mongol conquest of Jin China: After the long Battle of Zhongdu, the Mongol forces capture Zhongdu (modern-day Beijing). Meanwhile, Genghis Khan has decamped to the edge of the grasslands and is on his way back to the Kherlen River. Without his restraining influence, the Mongols run wild. They devastate and ransack the city, killing thousands. The royal palace goes up in flames, and a part of the capital burns for a month.^[8]
King Kalinga Magha, from Kalinga Province in India, lands in Sri Lanka with a force of 24,000 men, to capture the city of Polonnaruwa and depose its king, Parakrama Pandya.

By topic

Art and Science

1215–1216 – The Macy Jug, from Iran, is made. It is now kept at the Metropolitan Museum of Art, New York.

Literature

Births

September 23 – Kublai Khan, Mongol emperor (d. 1294)
Agnes of Merania, German noblewoman (d. 1263)
Beatrice d'Este, queen consort of Hungary (d. 1245)
Catherine Sunesdotter, queen of Sweden (d. 1252)
Celestine V, pope of the Catholic Church (d. 1296)
David VII (or David Ulugh), king of Georgia (d. 1270)
Eleanor of England, countess of Leicester (d. 1275)
Henry II, prince of Anhalt-Aschersleben (d. 1266)
Henry III, Margrave of Meissen ("the Illustrious"), German nobleman (d. 1288)
Ibn Kammuna, Arab Jewish philosopher (d. 1284)
John I, French nobleman and knight (d. 1249)
John XXI, pope of the Catholic Church (d. 1277)
John of Ibelin, count of Jaffa and Ascalon (d. 1266)
Maria of Antioch-Armenia, lady of Toron (d. 1257)
Mécia Lopes de Haro, queen of Portugal (d. 1270)
Otto III, Margrave of Brandenburg ("the Pious"), German nobleman (d. 1267)
Robert Kilwardby, archbishop of Canterbury (d. 1279)
Roger de Leybourne, English landowner (d. 1271)

Deaths

February 3 (or February 4) – Eustace, bishop of Ely
February 6 – Hōjō Tokimasa, Japanese nobleman (b. 1138)
June 9 – Manegold of Berg, German abbot and bishop
August 1 – Eisai, Japanese Buddhist priest (b. 1141)
September 1 – Otto I, bishop of Utrecht (b. 1194)
November 5 – Philip de Valognes, Norman nobleman
November 17 – Giles de Braose, bishop of Hereford
December 21 – Ali ibn Muhammad ibn al-Walid, Arab theologian^[9]
Ali ibn Abi Bakr al-Harawi, Persian traveller and explorer
Bertran de Born, French nobleman, poet and troubadour
Esclarmonde of Foix, French noblewoman and Cathar
Giraut de Bornelh (or de Borneil), French troubadour
Jacopino della Scala, Italian merchant and politician
Manfred II (del Vasto), marquis of Saluzzo (b. 1140)
Sicard of Cremona, Italian bishop and writer (b. 1155)
Theodore Apsevdis, Byzantine painter (b. 1150)

References

^ Peter of les Vaux de Cernay (1998). The History of the Albigensian Crusade, pp. 554–559. Suffolk, UK: Boydell & Brewer. ISBN 0-85115-807-2.
^ Warren, W. Lewis. (1991). King John, p. 233. London: Methuen. ISBN 0-413-45520-3.
^ Tout, T. F.(1889). "Fitzwalter, Robert". In Stephen, Leslie (ed.) Dictionary of National Biography. London: Smith, Elder & Co. pp. 225–229.
^ Williams, Hywel (2005). Cassell's Chronology of World History. London: Weidenfeld & Nicolson. pp. 133–135. ISBN 0-304-35730-8.
^ Hywel, Williams (2005). Cassell's Chronology of World History, p. 134. London: Weidenfeld & Nicolson. ISBN 0-304-35730-8.
^ Herbermann, Charles, ed. (1913). "Ordeals" . Catholic Encyclopedia. New York: Robert Appleton Company.
^ Palmer, Alan; Palmer, Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 77–79. ISBN 0-7126-5616-2.
^ Man, John (2011). Genghis Khan: Life, Death and Resurrection, p. 171. ISBN 978-0-553-81498-9.
^ Poonawala, Ismail K. (2009). "ʿAlī b. al-Walīd". In Fleet, Kate; Krämer, Gudrun; Matringe, Denis; Nawas, John; Rowson, Everett (eds.). Encyclopaedia of Islam (3rd ed.). Brill Online. doi:10.1163/1573-3912_ei3_COM_22932. ISSN 1873-9830.