Before it was called Istanbul, this great city was known as Constantinople. Therefore, due to its ancient history, this city is home to many old world wonders. One of these wonders are the ancient walls of Constantinople.

The ancient walls of Constantinople, also known as the walls of Istanbul, are a series of defensive walls around Constantinople that have been established since the founding the city as the new capital of the great roman empire by Constantine I. This magnificent wall is 22.5 Km long and has more than 400 towers. It also has several trenches and strongholds that completely surround the city.