Illingen Castle was documented first time in 1359 when it was owned by Dietrich V. von Kerpen (this is why castle is also called Kerpen Castle). In the16th century it was moved to the hands of Nassau-Saarbrücken counts, who owned Illigen until French Revolution. Illingen castle was badly damaged in the Thirty Years' War and rebuilt later.
The castle started to decay after 1825 and was used as a quarry. The tower was restored in 1951 and today there is a restaurant.
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.