Built around 1150 by Guy III le Bouteiller de Senlis, Château de Montépilloy dominates the county of Senlis, thanks to its formidable keep, probably the highest of the royal domain at the time of its construction (around 1190-1200).
Testimony of a prestigious medieval past, the remains of the fortified castle include, in addition to the keep, an enclosure with a polygonal moat, an entrance gate through which one accesses the farmyard, a curtain wall with machicolation connecting the keep to the stately home and its semi-circular flanking tower.
The castle and its seigneury belonged to a succession of historical figures, each close to a king of France. The castle is open to the public
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.