New York, United States
1858
New York, United States
1839-1846
New York, United States
1764-1766
New York, United States
1843-1846
Washington, D.C., United States
1907-1990
San Juan Capistrano, United States
18th century
New York, United States
1840-1841
New York, United States
1870-1872
Washington, D.C., United States
1893-1913
New York, United States
1847
Washington, D.C., United States
1920
New York, United States
1846
Washington, D.C., United States
1954-1962
Washington, D.C., United States
1904-1955
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.