Walls of Istanbul; Istanbul has been surrounded by walls four times since the day it was founded. Walls built by Byzas in the 7 BC. – by Septimus Severus in 196 AD.– by Constantine 1, in the 4C AD.- by Theodosius 2, in the 5C AD. Final walls of Istanbul are among the longest walls in Europe with length of 21 km / 13 miles. In the walls of Istanbul there are more than 50 gates and 300 bastions. |
