The Gembloux belfry is part of the former parish church of Saint-Sauveur which dates probably date back to the 10th century. The church was no longer in use from 1810 and then demolished. In 1905, the bell tower was destroyed by a fire. From 1907 this was replaced by a new spherical bell. Gembloux's Belfry belongs to the set of belfries of Belgium and France inscribed on UNESCO's World Heritage List in 2005.
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.