books.google.co.uk - Having defeated a Germanic invasion of northern Italy, the Emperor Aurelian surrounded Rome with a powerful circuit of walls. This great fortification is one of the best preserved of all city walls in the Roman Empire and remains a dramatic feature of Rome today, representing the most emblematic and...http://books.google.co.uk/books/about/The_Walls_of_Rome.html?id=SDxrLQymWWwC&utm_source=gb-gplus-shareThe Walls of Rome
