Athens, Greece
447 BC
Thessaloniki, Greece
12th century
Corfu, Greece
15th century
Nafplio, Greece
1711-1714
Heraklion, Greece
1462
Agios Nikolaos, Greece
16th century
Rethymno, Greece
1573-1580
Nafplio, Greece
13th century
Corfu, Greece
16th century
Thessaloniki, Greece
4th century AD
Rhodes, Greece
1464
Thessaloniki, Greece
4th century AD
Halki, Greece
14th century
Corfu, Greece
6th century AD
Monolithos, Greece
1480
Corfu, Greece
13th century
Methoni, Greece
13th century
Rhodes, Greece
1309
Mystras, Greece
1249
Attavyros, Greece
1472
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.