The Unit dHabitation in Marseille, designed by Le Corbusier, stands as one of the most iconic works of modern architecture. Completed in 1952, this structure is a paradigmatic example of the urban and residential vision of the renowned Franco-Swiss architect.The concept of the Unit dHabitation stems from Le Corbusiers idea of creating a vertical city, a building that could house a self-sufficient and autonomous community. This idea translates into a residential complex that hosts 337 apartments, distributed over 18 floors. Each apartment is conceived as a living cell, an integral part of a larger organism.The building is distinguished by its use of bton brut, raw concrete that gives the structure a massive and monumental appearance. The unfinished surfaces of the concrete, a hallmark of Brutalism, create a strong contrast with the vibrant colors of the balconies and interiors. This use of material reflects Le Corbusiers desire to express the structural and material truth of the building, without hiding its essence.The Unit dHabitation is not just a residential building but a true urban microcosm. Within the structure, there are various communal services, including a nursery school, a hotel, shops, a swimming pool, and a rooftop garden. This approach to design highlights Le Corbusiers intent to create spaces that foster social interaction and improve the quality of life for residents.However, the Unit dHabitation is not without its criticisms. Some critics point out that the emphasis on functionality and efficiency has led to interior spaces that, while innovative, can feel alienating and impersonal. The predominant use of concrete, although symbolic, can also be perceived as oppressive and cold. Moreover, the idea of a self-sufficient community has raised questions about isolation and separation from the surrounding urban fabric.In the current context, the Unit dHabitation continues to be a subject of debate and study. While some consider it an ideal model of collective housing, others see it as a utopian experiment with practical limitations. Regardless of opinions, it is undeniable that this building has had a significant impact on 20th-century architecture, influencing generations of architects and urban planners.