The history of Bennebols Ironworks started in 1683, when Gustaf Otto Stenbock built there a blast furnace.A small ironworks village grew up to one of Uppland's many Walloon ironworks villages. Iron production ceased in 1884, but the village environment lives on, with a bailiff's residence that includes the ironworks office in one of the wings, a schoolhouse, a row of stables, remains of a charcoal house, a blast furnace, a roasting oven, and a town street lined with residences and barns.
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.