Sorry, feel free to move this topic if you feel like it, but since many historians seem to gather round this place, I thought maybe I should ask here.

I'm trying to create a collection of European city/town maps during the Roman era. Till now, I've only found a select few (obviously Rome and a couple here and there, along with the ancient cities in my country), and I'd like to have as many as possible, preferable during the mid-Republic phase but really anything would do, as long as we're talking Roman era. To be honest I'm mostly interested in the lines of ancient fortifications (city walls i.e.), as can be established through archaeology or ancient accounts, so I'm fine with city wall maps. Even hypothetical plans would do.

If anyone can point me to a website or a book that contains collections of such plans/maps I'd really appreciate it! (I just posted the same question in Roman-army.com)