Career
He worked for the Town Planning department of Amsterdam (1929-1959) and was the chairman of the Congrès Internationaux d’Architecture Moderne (1930-1947). After winning the design competition for the upgrade of the Unter den Linden boulevard in Berlin, in 1927 he became a visiting professor at the Staatliche Bauhochschule in Weimar. From 1929 to 1959 he worked for the Town Planning department of Amsterdam, after which he worked as consultant.
After World World War II he was appointed professor of urban planning at the Delft University of Technology.
His key projects include the Amsterdam General Extension Plan, the development plan for the Southern IJsselmeerpolders and the town plan for Lelystad.