Among the many challenges faced by Le Corbusier in his Indian projects, adaptation to climate was by no means the least. What was at stake was to demonstrate the virtues of modern architecture in a difficult climate, which grouped in a round a very hot season from March to May (temperatures around 40°C), a very wet season from June to October (arrival of the monsoon), and a cool season from November to February. Apart from the question of sunlight that Le Corbusier had grappled with since the early 1930s, problems of interior ventilation, control of air humidity levels and protection against rain came to the fore as elements of vital importance for his projects in India.