While I was at CRISIS, someone stopped by to tell me about the 3D arena he'd made for our Ludus Gladiatorius game. He later sent me a picture (his name is Ludo Nauws, by the way).
What I wonder is, does this look like any kind of arena that really existed (to the best of our knowledge), perhaps a training ground or provincial venue? Or does it look totally unlikely?
I hope it has some genuine qualities because it's a nice setting and reasonably easy to make.
Doug