Look up also extremely influential architect and noted fascist Le Corbusier.

https://en.wikipedia.org/wiki/Unit%C3%A9_d%27habitation

The building also incorporates shops including an architectural bookshop, a rooftop gallery, educational facilities, a hotel that is open to the public, and a restaurant, "Le Ventre de l'Architecte" ("The Belly of the Architect").

It was a huge trend after the war for a variety of economic and ideological reasons.