St. James' Church is first mentioned in archival records dating to 1285, and was later rebuilt as a Gothic-style church. A Brick Gothic church, the building is comprised from granite blocks at its base, and sandstone quarry derived bricks higher up. St. Jacob's is a three-aisled hall church, with stain glass windows dating to the 14th and 15th century preserved in the church's ambulatory. The choir banks were installed in 1430. Also of interest in the church is the beautiful sandstone pulpit added in 1612.
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.