A great start-I'm partial to any sort of classical ruins myself. :)
You've likely seen this already, but the Temple of Bacchus in Baalbek, Lebanon is extremely well preserved and is a great example of this type of building. Again, you may not elect to use since you're already so far into that particular style of the temple, but I figured I would show you anyway.
I've been there, and let me say that it's a very well preserved piece of Roman architecture. If you decide to incorporate details of this and need more specific details, I might have some pictures in my own collection that could help potentially.
Anyway, whether you to decide to incorporate that or not, I'm looking forward to this being ingame. Good luck, and I'll be sure to follow this project!