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This article is about the year 1209.
|1209 by topic|
|Political entities - State leaders - Religious leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1209 in poetry|
|Ab urbe condita||1962|
|Balinese saka calendar||1130–1131|
|English Regnal year||10 Joh. 1 – 11 Joh. 1|
|Chinese calendar||戊辰年 (Earth Dragon)
3905 or 3845
— to —
己巳年 (Earth Snake)
3906 or 3846
|- Vikram Samvat||1265–1266|
|- Shaka Samvat||1130–1131|
|- Kali Yuga||4309–4310|
|Japanese calendar||Jōgen (Kamakura period) 3
|Minguo calendar||703 before ROC
|Thai solar calendar||1751–1752|
|Wikimedia Commons has media related to 1209.|
- Genghis Khan conquers Western Xia.
- The army of the Kingdom of Georgia raids the Muslim principalities in north Iran.
- The Albigensian Crusade is launched against the Cathars.
- May – The First Parliament of Ravennika is held in Greece.
- June – Treaty of Sapienza: the Republic of Venice recognizes the possession of the Peloponnese by the Prince of Achaea, Geoffrey I of Villehardouin, and keeps only the fortresses of Modon and Coron.
- November – John 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. This year, he feeds a hundred 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."
- London Bridge is completed.
- Black Monday, Dublin: A group of 500 recently arrived settlers from Bristol are massacred by warriors of the Gaelic O'Byrne clan. The group leaves the safety of the walled city of Dublin to celebrate Easter Monday near a wood at Ranelagh, and are attacked without warning. Although in modern times a relatively obscure event in history, it is commemorated by a mustering of the Mayor, Sheriffs and soldiers on the day, as a challenge to the native tribes for centuries afterwards.
- Cambridge University is founded.
- Philippe Auguste of France grants a "conduit" to merchants going to the Champagne fairs, guaranteeing the safety of their travel, as any attempt made against them is now to be considered as a crime of lese-majesty. The decision increases again the appeal of the fairs, to merchants from Italy and the Low Countries.
- The banking firm known as the Gran Tavola is formed; most of the partners are members of the Bonsignori Family. 
- The Franciscan Order is founded.
- January 5 – Richard, 1st Earl of Cornwall, Holy Roman Emperor (d. 1272)
- Haji Bektash Veli, Khorasanian mystic (d. 1271)
- Möngke Khan, 4th Khagan of the Mongol Empire (d. 1259)
- Bettisia Gozzadini, Italian scholar (d. 1260)
- November 12 – Phillipe de Plessis, Grand Master of the Knights Templar (b. 1165)
- Walter Map, Welsh writer (b. 1137)
- Elisabeth of Greater Poland, Duchess of Bohemia (b. 1152)
- Fakhr al-Din al-Razi, Persian theologian and philosopher (b. 1149)
- Nizami Ganjavi, Persian mystic poet
- King John by Warren. Published by University of California Press in 1961. p. 141
- Recueils de la Société Jean Bodin pour l'histoire comparative des institutions. Paris: Éditions de la Librairie encyclopedique. 1953.
- Catoni, Giuliano. "BONSIGNORI". Dizionario Biografico degli Italiani. Retrieved 20 December 2011.