Charleroi, Belgium
1936
Tienen, Belgium
14th century
Amiens, France
1406-1410
Veurne, Belgium
1628
Sint-Truiden, Belgium
13th century
Lier, Belgium
1369/1740
Tielt, Belgium
1773
Dendermonde, Belgium
1337
Nieuwpoort, Belgium
14th century
Menen, Belgium
1782
Abbeville, France
1209
Diksmuide, Belgium
1428
Thuin, Belgium
17th century
Zoutleeuw, Belgium
1231
Herentals, Belgium
1534
Roeselare, Belgium
1769-1771
Eeklo, Belgium
17th century
Cambrai, France
1447
Lo-Reninge, Belgium
1565-1566
Gembloux, Belgium
12th 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.