Philip Johnson was an influential American architect who helped introduce modern architecture to the United States. He founded the architecture department at MoMA in 1930 and curated a landmark exhibition on the International Style. Johnson's Glass House, built in 1949, was his masterpiece that explored modern design through its use of glass and steel. Throughout his career, Johnson designed many iconic office towers in various styles, including collaborating with Mies van der Rohe on the Seagram Building. He is credited with popularizing modern architecture and elevating the status of architects.