Kőszeg, Hungary
13th century
Simontornya, Hungary
13th century
Sárospatak, Hungary
15th century
Nagyvázsony, Hungary
1472
Komáromi, Hungary
1850-1871
Budapest, Hungary
1743-1751
Szigetvár, Hungary
14th century
Zsámbék, Hungary
1690s
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.