Næstved, Denmark
c. 1200
Rønne, Denmark
12th century
Ringkøbing, Denmark
15th century
Farum, Denmark
12th century
Nykøbing Falster, Denmark
1482
Allinge, Denmark
14th century
Nyborg, Denmark
1388-1428
Allinge, Denmark
12th century
Aakirkeby, Denmark
ca. 1165
Graested, Denmark
c. 1140
Skanderborg, Denmark
1060s
Praesto, Denmark
1225-1250
Vestervig, Denmark
1059
Nakskov, Denmark
13th century
Copenhagen, Denmark
1180s
Næstved, Denmark
1135
Bogense, Denmark
1406
Odense, Denmark
12th century
Hedensted, Denmark
c. 1150
Rømø, Denmark
c. 1200
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.