Soria, Spain
c. 756 AD
Baena, Spain
9th century AD
Es Mercadal, Spain
17th century
Jimena de la Frontera, Spain
8th century AD
Aguilar de Campoo, Spain
12th century
Cabra, Spain
9th century AD
Hermandad de Campoo de Suso, Spain
13th century
Sabiote, Spain
16th century
Alburquerque, Spain
13th century
La Adrada, Spain
14th century
Arévalo, Spain
14th century
Grajal de Campos, Spain
16th century
Aguilas, Spain
18th century
Jerez de los Caballeros, Spain
13th century
Alaró, Spain
15th century
Rebolledo de la Torre, Spain
14th century
El Coronil, Spain
14th century
El Barco de Ávila, Spain
15th century
Madrid, Spain
1431
Oropesa, Spain
13th 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.