The first 3 generations were based on regions in Japan (I thought).
Gen V seemed to have been based off of America (USA specifically). New York=Castelia, Hollywood=Pokéwood. Elesa is a model, Clay is a Texan Oil Magnate, Bryce is an actor.
So with the Eiffel Tower-esque building, I believe it could be based on Europe.
If so, I'll already love this generation for that simple fact.