Both Warsaw and Gdansk were bombed during the war and had to be re-constructed. They paid a lot of attention to detail to recreate the Old Town look, and after 60 or so years they look pretty authentic. (I'm afraid of how Disneyland/Westworld it might have all looked right after they rebuilt everything in the '50s.)
Something I saw that could be applied to more modern buildings Stateside is an exterior trompe l'oeil treatment. Basically, if you don't have any interesting architectural details to the outside of your space, why not fake it?
I found these pretty good examples:
And of course, you could have some fun inside too ;-)