Nørresundby, Denmark
400 - 1050 AD
Stege, Denmark
3000-1500 BC
Egtved, Denmark
1390-1370 BC
Askeby, Denmark
3300-3200 BC
Sabro, Denmark
1350 BC
Humble, Denmark
2000 BC
Vedbaek, Denmark
6000-4500 BC
Føvling, Denmark
1350 BC
Aalestrup, Denmark
1800-1000 BC
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.