Mladá Boleslav Castle, originally built in the first half of the 14th century, has gone through many development stages. Despite the Renaissance castle and the period of devastation after the Thirty Years' War, the army took over the building for 200 years and converted it into a barracks. Between 1940 and 1943, Jews from the wider Boleslav area were interned here. Today it is the seat of the Museum of Mladá Boleslav and Archive.
The castle was used as a seat of castle wardens and later clerks serving the nobility and the nobility itself.
After the Thirty Years’ War, the castle became the property of the town and decayed significantly. In the mid-18th century, the entire building was reconstructed to serve as army barracks and was used by the army until 1953. After this, the castle served as a textile warehouse until 1972.
The Museum of the Mladá Boleslav region currently operates in the castle.
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.