Postmodernism emerged as an architectural movement in the late 1970s that rejected modernism's focus on newness and avant-garde styles, instead incorporating classical elements from the past alongside modern utility. Examples cited include Frank Gehry's Guggenheim Museum from 1997, Michael Graves' Portland Building from the 1980s, and Philip Johnson's Sony Building in New York City, which combined classical forms with contemporary design.

1. Post Modernism
Guggenheim Museum , by Frank Gehry ,1997
Postmodernism was a movement in architecture that rejected the modernist,
Avant garde, passion for the new. Postmodern
architecture began as an international style
the first examples of which are generally cited
as being from the 1950s, but did not become
a movement until the late 1970s and
continues to influence present-day
architecture. Modernism was an exploration
of possibilities and a perpetual search for
uniqueness and its cognate--individuality.
Modernism's valorization of the new was
rejected by architectural postmodernism in
the 50's and 60's for conservative reasons.
They wanted to maintain elements of modern
utility while returning to the reassuring
classical forms of the past.
Examples of postmodern architecture are
Michael Graves' Portland Building in Portland,
Oregon and Philip Johnson's Sony Building
The Sony Building in New York City,
1984, by Philip Johnson
(originally AT&T Building) in New York City.