The Château des Tourelles was built originally in 1196, when Philippe Auguste (Philip II of France), fighting against the king of England, Richard the Lionheart, for possession of Normandy, seized Vernon and made the town a military base. The castle consists of a square tower surounded by four round turrets, the whole edifice rising to a height of twenty metres. It is one of the few castles in France which has been practically unchanged for 800 years. The property of the commune, it has been listed since 1926 as a monument historique by the French Ministry of Culture.
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.