2 point exterior at twilight (or if it's a very big city... just night.)
3 Point exterior- I've heard with perspective drawings there are what's called "cones of vision" that even if you follow perspective perfectly if you go very far out from the center everything gets really warped. You can see a little of that around the edges of this one.
2 Point interior. I was going for a ruins look. The arched doorways take a while.