OMA:Metropolitan Architects of the Netherlands is A firm specializing in contemporary architectural design, urban planning and cultural analysis, employing approximately 100 architects, researchers, designers, CAD architects, model builders, industrial designers and teachers from around the world.

The Office For Metropolitan Architecture (OMA) is often referred to as OMA. Founded in 1975 by the Dutch architect Rem Koolhaas in Rotterdam, the firm was founded by Elia Zenghelis, Madelon Vriesendorp and Zoe Zenghelis, in addition to Rem Koolhaas. Zenghelis.