The Château de Roquessels was built in the 10th century. It was a dependency of the convent of Cassans, which collected tithes from the baron of Margon. In 1247, the inhabitants of the village, like all subjects of the Trencavels, viscount of Béziers, were released from their pledge of allegiance and submitted to the King of France. The castle resisted valiantly the assaults of Simon de Montfort's army. Today, the only remains are a chapel with fine windows and massive walls on three sides.
The castle was abandoned for more comfortable dwellings in the 18th century, in line with the changing tastes of the aristocracy of the period. The keep was destroyed during the French Revolution and its stones used to build the new mairie (town hall).
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.