Diksmuide, Belgium
1428
Herentals, Belgium
1534
Roeselare, Belgium
1769-1771
Brussels, Belgium
1782
Brussels, Belgium
1905-1911
Brussels, Belgium
1780s
Brussels, Belgium
1776
Eeklo, Belgium
17th century
Heers, Belgium
1770s
Lo-Reninge, Belgium
1565-1566
Westerlo, Belgium
1909-1912
Auderghem, Belgium
1780
Brugelette, Belgium
1752
Torhout, Belgium
1837-1852
Brussels, Belgium
1725
Ath, Belgium
1793
Sint-Truiden, Belgium
1787-1789
Namur, Belgium
1711
Ciney, Belgium
1890
Florennes, Belgium
1633
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.