Le Grand-Pressigny, France
12th century
Lavardin, France
11th century
Talcy, France
1221
Le Controis-en-Sologne, France
1475-1483
Châteaubriant, France
11th century
Chilleurs-aux-Bois, France
16th century
La Ferté-Saint-Aubin, France
c. 1625
Luynes, France
12th century
Cellettes, France
1545
Mazé-Milon, France
1772
Tour-en-Sologne, France
1527-1537
Haute-Goulaine, France
12th century
Château-Renault, France
1140
Monthou-sur-Cher, France
15th century
Vendôme, France
12th century
Montlouis-sur-Loire, France
1520
Saché, France
16th century
Cheverny, France
1450
Durtal, France
15th century
Longuenée-en-Anjou, France
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.