The city is surrounded by 7 miles of walls, meaning you could walk around the historic center all day, starting at the Gate and Clock Tower and finishing with a sunset over the Caribbean Sea.

Five different sets of walls have been built around the city of Constantinople, the most important of which was the last, built under the reign of Theodosius II, who came to power in 408 AD. Also ...

In the city's long history, the earliest walls were built in Zhongdu, capital of the Jin Dynasty. At that time more than one million civilians and soldiers toiled for three years to expand the old ...