Corinth, Greece
2000 BCE
Poros, Greece
520 BCE
Arcadia, Greece
4th century BCE
Vai, Greece
700 BC
Lemnos, Greece
500 BCE
Argos-Mykines, Greece
4th century BCE
Elis, Greece
4th century BCE
Thasos, Greece
6th century BCE
Thasos, Greece
6th century BCE
Mikri Doxipara, Greece
2nd century AD
Corfu, Greece
580 BCE
Ierapetra, Greece
1700 BC
Iasmos, Greece
5th century AD
Epidaurus, Greece
2nd century AD
Kandanos Selinos, Greece
400 BC
Ithaki, Greece
1300 BCE
Arcadia, Greece
7th century BCE
Sparta, Greece
5th century BCE
Maroneia-Sapes, Greece
6th century BCE
Kefalonia, Greece
6th century BCE
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.