Roman walls on National Geographic

[Franciscus]

On the September issue of the Portuguese National Geographic we have a beautiful article about the Roman "walls", with some amazing pics.

Link to the article in the site, in english:

http://ngm.nationalgeographic.com/2012/09/roman-walls/curry-text

Regards

[ferrenava]

Certainly very interesting, thanks

[Laruku]

There is a book related to that: "The Empire Stops Here", by Philip Parker, about the frontiers of the Roman Empire.

http://www.amazon.co.uk/The-Empire-Stops-Here-Frontiers/dp/1845950038/ref=sr_1_1?ie=UTF8&qid=1346506603&sr=8-1