The oldest monument of Boulogne-sur-Mer was built in three stages, in the 12th, 13th and 18th centuries. In fact, this belfry was originally a seigniorial prison, transferred to the community in 1230. 38 years later, Saint-Louis ordered the destruction of the tower’s second floor, as well as of the community’s charter of freedom and the town’s seal, as it was refusing to pay a tax on the eighth crusade. One year later, the town, its privileges restored, was able to rebuild the missing part. As for the last octagonal level, it was built in 1734, after the spire was burnt.
Today the belfry is one of 56 in northeastern France and Belgium with shared UNESCO World Heritage Site status and serves as the home to a museum of Celtic remains from the Roman occupation.
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.