Rome was the heart of the mighty empire and is today home to many of the most stunning Roman ruins, from the mighty Colosseum to more bizarre attractions like the Mount of Truth. Another of the top attractions in Rome is the ancient Aurelian Walls, built to defend the Eternal City.

The most complete Roman city walls in the world today are not in Italy but are the mostly intact city walls of Lugo in Spain. The most famous Roman city walls still standing today are probably the once formidable Theodosian Walls of Constantinople that visitors can still see in Istanbul today.