Postmodern architecture is a style or movement which emerged in the 1960s as a reaction against the austerity, formality, and lack of variety of modern architecture, particularly in the international style advocated by Le Corbusier and Ludwig Mies van der Rohe. The movement was introduced by the architect and urban planner Denise Scott Brown and architectural theorist Robert Venturi in their book Learning from Las Vegas. The style flourished from the 1980s through the 1990s, particularly in the work of Scott Brown & Venturi, Philip Johnson, Charles Moore and Michael Graves. In the late 1990s, it divided into a multitude of new tendencies, including high-tech architecture, modern classicism and deconstructivism.
(Wikipedia)