What is the name of Le Corbusier's model house at the 1925 Paris Exposition?

Le Corbusier's model house at the 1925 Paris Exposition was the Pavillon de l'Esprit Nouveau.

The pavilion was designed by Le Corbusier and his cousin and collaborator Pierre Jeanneret for the Exposition Internationale des Arts Décoratifs et Industriels Modernes in Paris. Its name, meaning “Pavilion of the New Spirit,” echoed the journal L'Esprit Nouveau, which Le Corbusier had founded with Amédée Ozenfant in 1920.

Rather than presenting ornate decorative design, the pavilion promoted a radically modern way of living. It contained a standardized apartment module, open planning, built-in furnishings, and a rooftop garden. Le Corbusier intended repeated modules to form larger residential communities, connecting the small exhibition house to his broader ideas about mass housing and urban planning.

A common mix-up is confusing it with later projects such as the Ville Radieuse or with Le Corbusier's Swiss Pavilion. Those were related to his modernist program, but neither was the 1925 model house. The original pavilion was temporary, although a reconstruction stands in Bologna, Italy.