The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople since its founding as the capital of the Eastern Roman Empire.
The Galata Walls were the defensive walls surrounding the Genoese colony of Galata, present-day Istanbul.
The Anastasian Wall, also known as the Long Walls of Thrace, is a Roman defensive line located in Istanbul, Turkey.
The Walls of Thessaloniki encircle the old city and stand as a monument of fortification.