Église Saint-Pantaléon Church was built in the 12th century. The first patron saint was saint Himère. After the epidemic of plague between the years 1337 and 1348, saint Pantaleon was chosen as saint patron. In 1835 as the church was too small, a new one was built. But from 1850, many cracks in the walls appeared. In 1874 and 1878, a new church was built with a larger nave. The roman bell tower was preserved. Behind the church, there are some archways from an old chapel Saint-Michel, which was an ossuary.
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.