Rychmburk castle was built in the 13th century and belonged to Tas of Rychmburk. One of its owners was Smil Flaška of Pardubice and Rychmburk in the 15th century. In 1425, the castle was seized by Hussites, in the 1st half of the 16th century Jindřich Šťastný of Valdštejn had it turned into a Late Gothic palace, afterwards Kinský had it renovated in the Baroque style in 1793 - 1798.
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.