Cirkulane, Slovenia
13th century
Bizeljska Vas, Slovenia
14th century
Velenje, Slovenia
13th century
Begunje, Slovenia
12th century
Prem, Slovenia
c. 1200
Brestanica, Slovenia
1131-
Kostel, Slovenia
15th century
Metlika, Slovenia
15th century
Ržiše, Slovenia
12th century
Branik, Slovenia
13th century
Vipava, Slovenia
1342
Slovenske Konjice, Slovenia
12th century
Rajec, Slovenia
15th century
Negova, Slovenia
15th century
Pišece, Slovenia
14th century
Vurberk, Slovenia
13th century
Podčetrtek, Slovenia
12th century
Leskovec pri Krškem, Slovenia
15th century
Gornja Radgona, Slovenia
1147-1182
Gorjuša, Slovenia
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.