Montquintin Castle was probably originally designed to defend the southern border of the counts of Chiny. It was built in the 11th century by order of Louis II, Count of Chiny (born 1025). Over the centuries the castle has undergone many changes. The central part was rebuilt the 18th centuryt by the Bishop of Hontheim, last owner. In 1869 a fire destroyed the castle. The basement includes a vaulted cellar, which is very well preserved.
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.