Wiesberg Castle stands above the Trisanna River, where the Paznaun Valley leads into the Stanzer Valley. The castle was probably built in the 13th century. From the end of the 14th century until 1411, the castle was owned by the Rottenberger family. From 1770 until 1840, the castle was owned by the Dukes of Wolkenstein. Near the castle in 1809 several hundred local militia defended the area against Bavarian and French troops. Today Schloss Wiesberg is a privately held property and is not open to the public. The castle can be seen from the Silvretta-Hochalpenstraße.
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.