Schloss Montabaur was the seat of the district administrator's office of the old Unterwesterwaldkreis until 1945 before becoming the seat of the Montabaur district government.
The curent appearance dates from the restoration made in 1687–1709. Today, it is owned by the Akademie Deutscher Genossenschaften, which has expanded it for use as a 4-star conference hotel and training centre for the Raiffeisenbank and credit unions. It stands in a prominent position above the town on the Schlossberg hill.
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.