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This article is about the year 1217. For the number, see 1217 (number).
|Centuries:||12th century – 13th century – 14th century|
|Decades:||1180s 1190s 1200s – 1210s – 1220s 1230s 1240s|
|Years:||1214 1215 1216 – 1217 – 1218 1219 1220|
|1217 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1217 in poetry|
|Ab urbe condita||1970|
|English Regnal year||1 Hen. 3 – 2 Hen. 3|
|Chinese calendar||丙子年 (Fire Rat)
3913 or 3853
— to —
丁丑年 (Fire Ox)
3914 or 3854
|- Vikram Samvat||1273–1274|
|- Shaka Samvat||1139–1140|
|- Kali Yuga||4318–4319|
|Japanese calendar||Kenpō 5
|Minguo calendar||695 before ROC
|Thai solar calendar||1759–1760|
|Wikimedia Commons has media related to 1217.|
- Mukhali is back in Genghis Khan's camp in Mongolia and receives the hereditary title of prince, a golden seal, and a white standard with 9 tails and a black crescent in the middle. He is appointed commander in chief of operations in North China.
- April 9 – Peter II of Courtenay is crowned emperor of the Latin Empire of Constantinople at Rome, by Pope Honorius III.
- May 20 – First Barons' War in England: Occupying French forces are defeated at the Battle of Lincoln by English royal troops led by William Marshal, Earl of Pembroke and survivors forced to flee south.
- June 6 – King Henry I of Castile dies aged thirteen from the fall of a roof tile in Palencia, an event which his regent, Álvaro Núñez de Lara, attempts to conceal. Henry's sister Berengaria succeeds to the throne.
- June – Haakon Haakonsson becomes King Haakon IV of Norway following the death of Inge II and largely ends the civil war era in Norway, reigning until 1263.
- August 24 – First Barons' War: In the Battle of Sandwich in the English Channel, English forces destroy the French and the French mercenary Eustace the Monk is captured and beheaded.
- August 31 – Ferdinand becomes King of Castile on abdication of his mother Berengaria.
- September 12 – First Barons' War in England ended by the Treaty of Kingston upon Thames: French and Scots are to leave England, and an amnesty is granted to rebels.
- September 20 – Treaty of Lambeth signed ratifying the Treaty of Kingston.
- September 21 – Livonian Crusade: The Livonian Brothers of the Sword and allied Livs and Letts defeat the Estonian army in the Battle of St. Matthew's Day and kill their leader Lembitu.
- November – In the Kingdom of Castile, former regent Álvaro Núñez de Lara is captured and forced to relinquish all his castles.
- Stefan Nemanjić is elevated to be first King of the Serbian lands by Pope Honorius III and crowned by Stefan's brother, Archimandrite Sava, in Žiča.
- Alcácer do Sal is reconquered by the troops of King Afonso II of Portugal.
- A decree made in England establishes that only Englishman can be clergy of Ireland.
- John I, Duke of Brittany (d. 1286)
- Baldwin, Latin Emperor of Constantinople (d. 1273)
- Henry I of Cyprus
- Eleanor of Provence, Queen of Henry III of England (d. 1291)
- Hulagu Khan, Mongol ruler of Persia (d. 1265)
- Boniface of Savoy, Archbishop of Canterbury (d. 1270)
- Izz al-Din ibn Shaddad, Arab historian (d. 1285)
- April 23 – King Inge II of Norway (b. 1185)
- April 25 – Hermann I, Landgrave of Thuringia
- June 6 – King Henry I of Castile (b. 1204)
- August 24 – Eustace the Monk, French mercenary and pirate (b. c.1170)
- September 10 – William de Redvers, 5th Earl of Devon, English nobleman
- September 21 – Lembitu of Lehola, Estonian resistance leader and Caupo of Turaida, Livonian leader (at the Battle of St. Matthew's Day)
- October 14 – Isabel of Gloucester, wife of King John of England (b. c.1173)
- Maria Comnena, wife of Amalric I of Jerusalem (b. c.1154) (latest possible date of death)
- Lovers of Teruel: Juan Martinez (aka Diego Marcilla) and Isabel Segura (alleged date)
- Palmer, Alan; Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 77–79. ISBN 0-7126-5616-2.
- Linehan, Peter (1999). "Chapter 21: Castile, Portugal and Navarre". In David Abulafia. The New Cambridge Medieval History c.1198-c.1300. Cambridge: Cambridge University Press. pp. 668–671. ISBN 0-521-36289-X.
- Picard, Christophe (2000). Le Portugal musulman (VIIIe-XIIIe siècle. L'Occident d'al-Andalus sous domination islamique. Paris: Maisonneuve & Larose. p. 110. ISBN 2-7068-1398-9.