Le Corbusier developed the Modulor system in the 1940s to establish harmonious proportions in architecture based on the human figure. The system uses the golden ratio and Fibonacci sequence to determine dimensions. He applied this system to projects like the Villa Savoye and Unité d'Habitation. The Villa Savoye exemplifies Le Corbusier's five points of architecture through its pilotis, free facade, free floor plan, ribbon windows, and green roof. The Unité d'Habitation in Marseille was an early experiment in mass housing and featured modular floor plans and elevations based on the golden ratio.