|Ab urbe condita||1965|
|Balinese saka calendar||1133–1134|
|English Regnal year||13 Joh. 1 – 14 Joh. 1|
|Chinese calendar||辛未年 (Metal Goat)|
3908 or 3848
— to —
壬申年 (Water Monkey)
3909 or 3849
|- Vikram Samvat||1268–1269|
|- Shaka Samvat||1133–1134|
|- Kali Yuga||4312–4313|
|Japanese calendar||Kenryaku 2|
|Minguo calendar||700 before ROC|
|Thai solar calendar||1754–1755|
1338 or 957 or 185
��� to —
1339 or 958 or 186
|Wikimedia Commons has media related to 1212.|
- July 10 – The most severe of several early fires of London burns most of the city to the ground; over 3,000 people die, many of them by drowning in the Thames. According to a contemporary account, "An awful fire broke out on the Southwark side of Lond. Bridge; and by some means, while it was raging, a fire broke out at the other end also, and so hemmed in the numerous crowds who had assembled to help the distressed. The sufferers, to avoid the flames, threw themselves over the bridge into boats and barges; but many of these sunk, the people crowding into them.".
- July 16 – Battle of Navas de Tolosa: The Christian kingdoms of Spain decisively defeat the Almohads, and the victory leaves the Kingdom of Castile in a difficult financial position, as numerous soldiers have to be paid by the treasury.
- December – Frederick II of Hohenstaufen is crowned King of Germany, with the support of Pope Innocent III.
- The Children's Crusade for the Holy Land is organised. There are probably two separate movements of young people, both led by shepherd boys, neither of which embark from Europe, but both of which suffer considerable hardship:
- The contemplative Order of Poor Clares is founded by Clare of Assisi.
- In Japan, Kamo no Chōmei writes the Hōjōki, one of the great works of classical Japanese prose.
- Bran Castle is erected by the Teutonic Knights, in the Southern Carpathians (present day Romania).
- John of England impounds the revenue of all prelates appointed by bishops who had deserted him at his excommunication. He remains on good terms, however, with churchmen who stood by him, including Abbot Sampson, who this year bequeaths John his jewels.
- The Banner of Las Navas de Tolosa is begun. It is a trophy of Ferdinand III of Castile, and will end up in the Museo de Telas Medievales.
- The city of Bergen op Zoom probably gets municipal rights.
- The fall of Argos to the Crusaders early in the year completes their conquest of the Morea. The city, along with Nauplia, is given to Otto de la Roche as a fief (Argos and Nauplia).
- March 22 – Emperor Go-Horikawa of Japan (d. 1234)
- Isabella II of Jerusalem (d. 1228)
- Malatesta da Verucchio, Italian condottiero, founder of the Malatesta family (d. 1312)
- Zita, patron saint of maids and domestic servants (d. 1272)
- Maria of Chernigov, princess regent of Rostov and chronicler (d. 1271)
- February 29 – Hōnen, founder of Jodo Shu, a branch of Pure Land Buddhism (b. 1133)
- April 12 – Vsevolod the Big Nest, Grand Prince of Vladimir (b. 1154)
- April/May – Maria of Montferrat, Queen of Jerusalem (b. 1192; post-natal complications)
- July 16 – William de Brus, 3rd Lord of Annandale
- August 26 – Michael IV, Patriarch of Constantinople
- October 9 – Philip I of Namur, Marquis of Namur (b. 1175)
- November 4 – Felix of Valois, French saint (b. 1127)
- December 5 – Dirk van Are, bishop and lord of Utrecht
- December 12 – Geoffrey, Archbishop of York (b. 1152)
- date unknown
- "Fires, Great", in The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance, Cornelius Walford, ed. (C. and E. Layton, 1876) p26
- 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.
- Bridge, Antony (1980). The Crusades. London: Granada Publishing. ISBN 0-531-09872-9.
- Warren, W. L. (1961). King John. Berkeley: University of California Press. pp. 169–172.