Explore the historic highlights of Bonn
Bonn, Germany
11th century
Bonn, Germany
1697-1705
Bonn, Germany
1889
Bonn, Germany
1715-1746
Bonn, Germany
13th century
Bonn, Germany
1858-1860
Bonn, Germany
1842
Bonn, Germany
1151
Bonn, Germany
14th 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.