
The Athens Charter distilled the conclusions of the fourth CIAM congress, held in 1933 aboard a ship between Marseille and Athens on the theme of the functional city. It reduced the city to four key functions — dwelling, work, recreation and circulation — and argued that these should be analysed and physically separated through zoning. The document was edited and published in expanded, more doctrinaire form by Le Corbusier in 1943. It advocated high-rise housing in open green space and the strict ordering of urban land by function.
It became the doctrinal core of functionalist planning and was widely applied in post-war reconstruction and new towns. The same zoning and tower-block prescriptions were later blamed for monotonous, socially impoverished environments and provoked a sustained anti-modernist reaction.