Aabenraa, Denmark
c. 1450
Kolding, Denmark
12th century
Sorø, Denmark
c. 1170
Ærøskøbing, Denmark
12th century
Kettinge, Denmark
1200-1250
Sakskobing, Denmark
c. 1200
Horslunde, Denmark
13th century
Nakskov, Denmark
14th century
Maribo, Denmark
12th century
Sønderborg, Denmark
13th century
Toreby, Denmark
c. 1200
Haderslev, Denmark
13th century
Vejle, Denmark
12th century
Sønderborg, Denmark
c. 1200
Vejle, Denmark
c. 1150
Neksø, Denmark
ca. 1200
Nakskov, Denmark
c. 1200
Nakskov, Denmark
13th century
Fårvang, Denmark
1246-1249
Horslunde, Denmark
12th 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.