With the AT&T Building (now named 550 Madison Avenue) (1978–1982), Johnson turned dramatically toward postmodernism. The building's most prominent feature is a purely decorative top modeled after a piece of Chippendale furniture, and it has other more subtle references to historical architecture. His intention was to make the building stand out as a corporate symbol among the modernist skyscrapers around it in Manhattan, and he succeeded; it became the best-known of all postmodern buildings. Soon afterward he completed another postmodern project, PPG Place in Pittsburgh, Pennsylvania (1979–1984), a complex of six glass buildings for the Pittsburgh Plate Glass Company. These buildings have neo-gothic features, including 231 glass spires, the largest of which is high.