5th May » Rebel barons renounce their allegiance to King John of England — part of a chain of events leading to the signing of the Magna Carta.
1st June » Zhongdu (now Beijing), then under the control of the Jurchens known as Jurchen ruler Emperor Xuanzong of Jin, is captured by the Mongols under Genghis Khan, ending the Battle of Zhongdu.
15th June » King John of England puts his seal (device) called seal to the Magna Carta.
24th August » Pope Innocent III declares Magna Carta invalid.
11th November » The Fourth Lateran Council meets, defining the doctrine of transubstantiation, the process by which bread and wine are, by that doctrine, said to transform into the body and blood of Christ.
Famous Birthdays in 1215
23rd September » Kublai Khan, Mongolian emperor (d. 1294)
Famous Deaths in History for 1215
6th February » Hōjō Tokimasa, Japanese emperor (b. 1138)