Thanks for your comments!

Sigurd: I made the layout of rooms only combat encounters in mind, but I'll look into your suggestions how to make it more believable. Windows are also a good idea, I should add few. Also noticed that outer walls of my temple are propably too thick, I might make them a bit smaller.

Ascension: You're right, I'll do some more work with floors. I don't want to use any patterns or textures with this one (although there is a small texture already in the pentagram), but I think I'll try to put some brown here and there with brushes like you suggested.