Rem Koolhaas, Pritzker Architecture Prize Laureate for the year 2000, and the Office for Metropolitan Architecture (OMA), which he founded in 1975, is one of a new breed of »global architects«. Reacting to the new framework in urban planning, he is trying to develop a theory of urbanism which architects and planners can use as a system of intellectual reference. The author analyses the theoretical writings and manifestos of the Office for Metropolitan Architecture (OMA) and places them in the context of the buildings: the new Campus Center of the Illinois Institute of Technology in Chicago, the embassy of the Netherlands in Berlin, the Kunsthal in Rotterdam and the master plan for Euralille and the Congrexpo.