CIAM (Congrese Internationaux d’Architecture Moderne), founded in 1928 and disbanded in 1958, was an organisation responsible of a series of congresses in the first half of the 20th century where the principles of the modern movement were settled.
They united some of the most prominent artists, architects and theorists of the moment, as Karl Moser, Le Corbusier, Walter Gropius, Alvar Aalto or Jose Lluis Sert. Architecture was understood by this group as an economic and social issue. They focused in different subjects of urbanism, landscape and architecture, resulting in influential theories and manifestos as the Athens Charter, with very revolutionary ideas: rigid functional planning in city plans, with ring belts between the areas reserved for the different functions, and a single type of urban housing of high, widely-spaced apartment blocks.
Le Corbusier’s La Ville Radieuse