Väskinde, Sweden
1250
Uppsala, Sweden
13th century
Uppsala, Sweden
13th century
Vallentuna, Sweden
c. 1213
Uppsala, Sweden
c. 1500
Simrishamn, Sweden
12th century
Arbrå, Sweden
ca. 1500
Norrtälje, Sweden
15th century
Ekerö, Sweden
12th century
Nässjö, Sweden
12th century
Enköping, Sweden
13th century
Ekolsund, Sweden
12th century
Uppsala, Sweden
13th century
Falköping, Sweden
ca. 1200
Falköping, Sweden
12th century
Falkenberg, Sweden
12th century
Slöinge, Sweden
12th century
Enköping, Sweden
ca. 1200
Östhammar, Sweden
late 1300s
Falun, Sweden
13th century
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.