The oldest part of Eksta Church is the tower, dating from the 13th century and still unchanged. The rest of the church is also from the Middle Ages, but was heavily rebuilt in 1838. The church still has four medieval portals, in both Romanesque and Gothic style. The interior of the church is largely Neoclassical, dating from the 1838 renovation. A few traces of medieval frescos have survived on the walls, as have a single stained glass window pane.
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.