The 47-metre-tall belfry is standing in the center of Béthune. The Belgian border can be seen from the top. The chime of the belfry is composed of thirty-six bells. A belfry has stood on the site since 1346. The current belfry plays melodies every 15 minutes, including the ch'ti (regional patois) children's lullaby min p'tit quinquin (my little darling). In 2005, the belfry was inscribed on the UNESCO World Heritage List as part of the Belfries of Belgium and France site, because of its architecture and testimony to the rise of municipal power in Europe.
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.