The first written mention of Úsov is from 1260. The castle was built around 1250. Before 1487 the lords of Vlašim modified the castle. In the 16th century, Úsov was in the possession of the lords of Boskovice, an in 1597 it was acquired by the House of Liechtenstein. The Liechtensteins owned the castle until 1945.
The castle was damaged during the Swedish occupation in 1643. During the rule by Hans-Adam I of Liechtenstein, in 1692–1699, it was reconstructed and partially rebuilt into a large three-storey Baroque residence, designed by Domenico Martinelli.
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.