Kyiv, Ukraine
1713
Kyiv, Ukraine
1037
Kyiv, Ukraine
1731-1745
Kyiv, Ukraine
1051
Kyiv, Ukraine
1899
Kyiv, Ukraine
1981
Kyiv, Ukraine
1106-1108
Kyiv, Ukraine
1017-1024
Kyiv, Ukraine
1113-1125
Kyiv, Ukraine
1882
Kyiv, Ukraine
1744
Kyiv, Ukraine
1919
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.