|Ab urbe condita||1964|
|Balinese saka calendar||1132–1133|
|English Regnal year||12 Joh. 1 – 13 Joh. 1|
|Chinese calendar||庚午年 (Metal Horse)|
3907 or 3847
— to —
辛未年 (Metal Goat)
3908 or 3848
|- Vikram Samvat||1267–1268|
|- Shaka Samvat||1132–1133|
|- Kali Yuga||4311–4312|
|Japanese calendar||Jōgen (Kamakura period) 5 / Kenryaku 1|
|Minguo calendar||701 before ROC|
|Thai solar calendar||1753–1754|
1337 or 956 or 184
— to —
1338 or 957 or 185
|Wikimedia Commons has media related to 1211.|
- April 21 – Santiago de Compostela Cathedral (begun in the 11th century) is consecrated, in the presence of King Alfonso IX of León.
- September 14 – The Canons Regular of the Order of the Holy Cross are founded in Liège.
- October 15 – Battle of the Rhyndacus: Latin emperor Henry of Flanders defeats the Nicaean emperor Theodore I Lascaris.
- Livonian Crusade: Battles of Viljandi and Turaida – The Crusaders fail to conquer the Viljandi stronghold, but manage to baptize Sakala and Ugandi counties in southern Estonia.
- Mongol forces under Genghis Khan invade the Jurchen-led Jin Dynasty of northern China, aiming at this stage simply to loot the countryside. A Jin army is defeated and slaughtered at the Battle of Yehuling near Zhangjiakou, and another is beaten at Mukden, where the city is taken. Zhongdu is also besieged by the Mongol hordes.
- Byzantine–Seljuq wars: Battle of Antioch on the Meander in Anatolia – Forces of the Empire of Nicaea under Theodore I Laskaris defeat those of the Seljuk Sultanate of Rûm whose leader, Kaykhusraw I, is killed on the battlefield.
- The church in the French city of Reims burns down; soon after, construction begins on Reims Cathedral.
- King John of England sends a gift of herrings to nunneries in almost every shire, despite his status as an excommunicant.
- The oldest extant double-entry bookkeeping system record dates from this year.
- Warren, W. L. (1961). King John. Berkeley: University of California Press. p. 172.