The Château de Cambiac is a 15th-century castle, probably constructed on the foundations of an earlier structure. It was given to the sieur Milhau, constable of Montauban, by Marguerite de Navarre.
At the end of the 19th century, massive restoration works gave the castle an extra floor and a pavilion. A Louis XII style was incorporated both inside and out.
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.