1213

1213 is a natural number that follows 1212 and precedes 1214. In mathematics it is a prime number, meaning only 1 and itself are its positive divisors. It is odd and not divisible by 3 or 5. In Roman numerals it is written MCCXIII.

In the calendar, the year 1213 CE falls in the High Middle Ages. A notable event was the Battle of Muret on September 12, fought near Muret in Occitania as part of the Albigensian Crusade. The Crusader forces, led by Simon de Montfort the Elder, defeated the coalition of Peter II of Aragon and Raymond VI of Toulouse, and Peter II died in the battle. The outcome helped shift control in southern France toward the French crown and accelerated the suppression of Cathar resistance.

Across Europe the year was influenced by the papacy of Innocent III, who supported crusading efforts and the expansion of church authority. 1213 sits within a broader pattern of feudal consolidation and religious conflict that would continue into the following decade, including the events leading up to the Magna Carta in 1215.