https://en.wikipedia.org/wiki/List_of_largest_buildings_in_the_world#Largest_usable_space
https://en.wikipedia.org/wiki/Coeur_Defense 3.77mil sq ft
http://defense-92.fr/justice/affaire-coeur-defense-la-societe-proprietaire-obtient-gain-de-cause-en-appel-4518
https://en.wikipedia.org/wiki/Palace_of_the_Parliament 3.7mil sq ft
