This publication presents a kind of dossier on Habitat Marocain (a collection of various materials). Given the significance of this key project in culture-specific modern architecture, a publication devoted to its design has long been a desideratum. The approach taken here, moreover, reflects the fact that in order to fully appreciate the project, we need to look at its evolution and what has happened since it was erected. Beyond the original architectural plans, therefore, the dossier also includes the preliminary stages in the project’s design and the architectural transformations that have been undertaken since Habitat Marocain was built. The basic assumption is that Habitat Marocain can only be properly understood in terms of the dynamics between formal and informal housing. The book combines original documents from the extensive estate of André Studer (gta Archive, ETH Zurich) and material owned by his widow, Theres Studer, with more recent material including two interviews and photographs of the transformed housing complex.