The oldest part of the Etelhem Church is a tower, built in the beginning of 1200s. The nave and choir were built around 1300 and sacristy added in 1600s. The interior is decorated with mural paintings made in the 1400s. The well-preserved stained glass in choir window dates from the 1300s. The font was made of sandstone in the late 1100s and wooden crucifix was carved in 1300s. The pulpit dates from 1648 and altar from 1690.
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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.