The Grosse Cloche is one of the oldest belfries in France, in the heart of Bordeaux. It was built in the 8th century AD to the site of ancient Gallo-Roman gate and restored in the 15-16th centuries. The bell was cast in 1775 and weighs than 7,750 kilos. The bell was used to inform and alert citizens. It is the symbol of Bordeaux and still in the city coat of arms.
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.