St Fanourios Church was built in the 13th century. It’s cross shaped and the interior is adorned with wonderful frescos. It officiated as a mesgit (small mosque) during the ottoman occupation. There is no known testimony for its name before the ottoman period. The interior was preserved in the 20’s by the Italian Archaeological Service. After the World War II, Greeks took over the church. In 1946 the church was inaugurated and dedicated to Agios Fanourios.
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.