This lecture explores the evolution of Le Corbusier’s architecture from the International Style to Brutalism. It revisits key ideas such as the Dom-ino structural system and the Five Points of a New Architecture, illustrated through Villa Savoye, and then explains how his approach changed after World War II. The lecture highlights projects like Pavillon Suisse, which shows early experimentation with curtain walls and reinforced concrete pilotis, and then moves toward his major Brutalist works such as Unité d’Habitation, Marseilles. A significant focus is placed on Brutalism (béton brut – raw concrete), a term later associated with architects like Alison and Peter Smithson, and how Corbusier used exposed concrete for expressive and monumental architecture. Through detailed discussion of Unité d’Habitation, the lecture explains ideas of high-density housing, standardized modular units, interlocking apartments, roof gardens, pilotis, and the Modulor system based on human scale. It also contrasts Corbusier’s collective housing vision with Frank Lloyd Wright’s individual houses, showing Corbusier’s desire to improve urban life through architecture. Overall, the lecture demonstrates his shift toward material honesty, sculptural forms, regional response (e.g., Chandigarh), and spiritual expression, marking a major transformation in modern architecture.