Considering that the architect of the original building was a Czech named Jan Letzel, I guess it's also possible that it's simply a coincidence. It would make sense for the eastern European architecture that formed such an integral part of the game's artisitic design to show up again in the ruins of City 17. On the other hand, it it was meant to resemble Hiroshima Dome, it would be a nice little, post apocalyptic subtlety to insert into the game.