Bellegarde, France
1355-1388
Chémery, France
13th century
Ancenis, France
15th century
Saint-Georges-sur-Loire, France
16th century
Saint-Patrice, France
18th century
Gizeux, France
14th century
Lassay-sur-Croisne, France
1480-1501
Paulmy, France
12th century
Blain, France
13th century
Oizon, France
ca. 1500
Montoire-sur-le-Loir, France
c. 1080
Le Cellier, France
1643-1649
Champtocé-sur-Loire, France
c. 1075
Saint-Denis-sur-Loire, France
c. 1200
Boulleret, France
13th century
Menars, France
1646
Château-la-Vallière, France
13th century
Seuilly, France
14th century
Seiches-sur-le-Loir, France
15th century
La Riche, France
1463
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.