Schleswig, Germany
c. 770 AD
Horn-Bad Meinberg, Germany
10000 BC
Schelklingen, Germany
40,000-30,000 BC
Trier, Germany
0-200 AD
Trier, Germany
2nd century AD
Trier, Germany
100-200 AD
Boppard, Germany
360 AD
Mainz, Germany
1st century AD
Mainz, Germany
0-100 AD
Garz, Germany
8th-9th century
Kempten (Allgäu), Germany
1st century AD
Arkona, Germany
9th century AD
Walting, Germany
90 AD
Welzheim, Germany
160 AD
Perl, Germany
2nd century AD
Mainz, Germany
9 BC
Oberursel, Germany
200-300 BC
Goseck, Germany
4900 BC
Badenweiler, Germany
0-100 AD
Trier, Germany
100-200 AD
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.