Struer, Denmark
c. 1536
Skive, Denmark
1200
Sønderborg, Denmark
c. 1100
Hasle, Denmark
ca. 1460
Stubbekøbing, Denmark
c. 1200
Højby, Denmark
12th century
Kolding, Denmark
12th century
Augustenborg, Denmark
12th century
Hedensted, Denmark
11th century
Vejle, Denmark
c. 1100
Aabenraa, Denmark
c. 1250
Fredericia, Denmark
12th century
Aakirkeby, Denmark
ca. 1100
Jyllinge, Denmark
c. 1100
Torrig, Denmark
1350
Hedensted, Denmark
13th century
Læsø, Denmark
1269
Nakskov, Denmark
ca. 1100
Nakskov, Denmark
c. 1464
Maribo, Denmark
c. 1100
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.