Unité d’Habitation, also known as the "Marseille Unit" or "Cité Radieuse," is an iconic residential building located in the city of Marseille, France. Designed by the eminent architect Le Corbusier, this structure on Boulevard Michelet is one of the most striking examples of 20th-century modernist and functionalist architecture, attracting architecture enthusiasts from all over the world.

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As a massive 18-story block, the building contains 337 apartments of various layouts, designed to house approximately 1,600 people. Unité d’Habitation was envisioned by Le Corbusier not merely as an apartment building, but as a complete "vertical city," providing its residents with everything necessary for a comfortable life.
The concept, revolutionary for its time, combined not only living spaces under one roof but also shops, a nursery school, and sports and cultural facilities, including a swimming pool and a gymnasium on the roof. This approach to organizing urban space became iconic and had a significant impact on the subsequent development of architecture and urban planning, making Unité d’Habitation more than just a residential complex—it is a true architectural manifesto.