Angenstein castle was founded in the middle of the 13th century by the for a strategic outpost between Basel and the Jura area. It was owned by the Counts of Pfirt, but half of it was apparently ceded in 1271 to the Bishop of Basel.
After 1557 the castle was destroyed by fires (1494 and 1517) and turned into a residence. The four-storey residential tower was built, which still characterize the appearance of Angenstein. The chapel was built in 1562 with new residential and commercial buildings. Its most important jewelery were three splendid glass windows, donated by the Bishop.
Thirty Years' War, fires and the poor conditions of the changing owners led to an increasing neglect. At the beginning of the 19th century numerous changes were made. In 1951, the city of Basel bought the Angenstein. In 1984 the castle was burned for the last time. From 1988 to 1991 it was completely renovated.
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.