Schloss Westerburg, first recorded in 1192, but probably built earlier, is situated in the town of Westerburg in the forested hills of the Westerwald and is on the site of an older castle dating to the 12th century. The latter belonged to the counts of Leiningen but was transferred to the House of Runkel as the result of the marriage of Siegfried III of Runkel to a daughter of the House of Leiningen in the early 13th century. In the first half of the 13th century the castle was the seat of the lords of Westerburg, who had split off from the House of Runkel by 1288 with Henry I of Westerburg.
The castle was considerably expanded and remodelled over the course of time and, for a long time was the residence of a branch of the counts of Leiningen-Westerburg. The northeast corner and the north front of the site are probably the oldest surviving sections. They include the castle chapel and probably date to the early 13th century. The building that contains the great hall was built between 1476 and 1483. The remaining parts of the site date to the 18th century when it was expanded to a schloss.
Schloss Westerburg is in private ownership and houses a restaurant, and a dental institute.
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.