Le Corbusier’s “Pavillon de l’Esprit Nouveau” was built in 1925 at the Paris Exposition des Arts Décoratifs was built as a model for the Le Corbusier’s larger scaled design the “Immeuble Villas”. The pavilion was and exhibit developed from the inside out showcasing Le Corbusier’s modern geometric structure in correspondence with the interior of the space. Attached to the pavilion was an annex, which was originally used as a studio while constructing the pavilion. During the exhibition the annex, rotunda was converted in to a showcase of Le Corbusier’s future works. The rotunda housed two large dioramas, each a hundred square meters in area, one of which showed the 1922 “Plan for a Modern City of 3,000,000 Inhabitants”; and the other was the “Voisin Plan” which proposed the creation of a new business center in the heart of Paris.