A church council held in January 1215 under the presidency of the papal legate Cardinal Peter of Beneventano.
The Albigensian Crusade (1209-1229) had led to the death of King Peter II of Aragon and the conquest of much of southern France by Simon of Montfort. Pope Innocent III sent the legate Peter in order to end the fighting and to prevent the nonjudicial expropriation of local princes, but also to continue clerical reform and the suppression of heresy.
Along with other dignitaries, five archbishops and twenty- eight bishops were in attendance. The council reaffirmed canons of recent Lateran and provincial councils regarding heresy, lawless mercenaries, and clerical extravagance. The prelates wanted to award all the conquered lands in France to Simon of Montfort, but Cardinal Peter ruled that the pope must first be consulted. Innocent in turn submitted the matter to the Fourth Lateran Council, where the lands were awarded to Simon.