Schönecken Castle is a ruined hill above the village of Schönecken in the Nims valley in the West Eifel mountains. The castle stands on the lowest hill ridge in the middle of a valley bowl. The site is guarded on all sides by higher hills. The castle was built around 1230.
The castle occupies a 120-metre-long rectangular site with an enceinte and three projecting towers. In the east the site is guarded by a wide neck ditch. The three towers stand on the south side, two of them being still three storeys high. The two round towers probably date to the 13th or 14th century, the central, rectangular one is more recent. All three towers and their curtain walls have been part of a multi-storey residential building since no later than the 16th century, as depicted in an 18th-century painting.
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.