Château de Hohenack is a ruined castle in the municipality of Labaroche. Significant building periods were the last quarter of the 12th century, the 13th, 15th and 16th centuries. In plan view, the edifice is typical of the 12th century, constituting a polygonal curtain wall and a square keep. The castle served both military and administrative functions before being destroyed in 1655 on the orders of the King of France. During the French Revolution, the ruin was sold as national property and, until 1898, it was treated as a quarry. The castle has suffered war damage.
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.