Cathar Castle refers to a series of medieval fortifications built by the Cathars, a religious group in the Languedoc region of France. These castles served as strongholds during the Albigensian Crusade in the 13th century, a conflict aimed at eradicating the Cathar faith. Notable examples include Montségur and Carcassonne, which showcase impressive architecture and strategic locations. The castles were often situated on high peaks or rugged terrain, providing natural defenses against attackers. Today, they are popular tourist destinations, attracting visitors interested in history, architecture, and the unique culture of the Cathar movement.