Philip Johnson, American architect, designed the IDS Center and PPG Place (died 2005)

Philip Cortelyou Johnson was an American architect who designed modern and postmodern architecture. Among his best-known designs are his modernist Glass House in New Canaan, Connecticut; the postmodern 550 Madison Avenue in New York City, designed for AT&T; 190 South La Salle Street in Chicago; IDS Tower in downtown Minneapolis; the Sculpture Garden of New York City's Museum of Modern Art; and the Pre-Columbian Pavilion at Dumbarton Oaks. His January 2005 obituary in The New York Times described his works as being "widely considered among the architectural masterpieces of the 20th century".

The IDS Center is an office skyscraper located at 80 South 8th Street in Minneapolis, Minnesota. Completed in 1973, it is the tallest building in Minneapolis, and the tallest building in the state at a height of 792 feet (241 m). It originally stood 775 feet 6 inches (236.37 m), though a 16-foot (4.9 m) garage for window washing equipment was added between 1978 and 1979. The structure rises to 910 feet (10,900 in) when including communications spires on the roof, indisputably the highest points in the city. The IDS was constructed as the headquarters of Investors Diversified Services, Inc.—now Ameriprise Financial. It also housed the headquarters of Dayton Hudson Corporation from 1972 until 2001.

PPG Place is a complex in downtown Pittsburgh, Pennsylvania, consisting of six buildings within three city blocks and five and a half acres. PPG Place was designed by architects Philip Johnson and John Burgee.