The House of Montfort is a noble family that originated in the region of Montfort-l'Amaury in France. Established in the 12th century, the family played a significant role in medieval politics and warfare, particularly during the Crusades. They were known for their strong ties to the Catholic Church and their involvement in various territorial disputes. One of the most notable members of the House of Montfort was Simon de Montfort, who became a prominent leader during the Albigensian Crusade. He is remembered for his efforts to suppress the Cathar heresy in southern France. The family's legacy continues to be studied in the context of medieval European history.