Rem Koolhaas founded the Office for Metropolitan Architecture in 1975 together with Elia and Zoe Zenghelis and Madelon Vriesendorp. He graduated from the Architectural Association in London and in 1978 published Delirious New York, a Retroactive Manifesto for Manhattan. In 1995, his book S,M,L,XL summarized the work of OMA and established connections between contemporary society and architecture. He heads the work of both OMA and AMO, the conceptual branch of OMA focused on social, economical and technological developments and exploring territories beyond architectural and urban concerns. Rem Koolhaas is a professor at Harvard University where he conducts the Project on the City.