Budapest, Hungary
1895-1902
Budapest, Hungary
1913
Budapest, Hungary
1550
Budapest, Hungary
13th century
Budapest, Hungary
1872
Székesfehérvár, Hungary
c. 1010
Csesznek, Hungary
1263
Rétsági, Hungary
13th century
Kisnána, Hungary
13th century
Somló, Hungary
13th century
Kaposvár, Hungary
1061
Somogyvár, Hungary
1091
Hungary, Hungary
1307
Markaz, Hungary
1270-1280
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.