Philip Johnson (1906–2005) began his career as a pure modernist. In 1935, he co-authored the famous catalog of the Museum of Modern Art exposition on the International Style, and studied with Walter Gropius and Marcel Breuer at Harvard. His Glass House in New Canaan, Connecticut (1949), inspired by a similar house by Ludwig Mies van der Rohe became an icon of the modernist movement. He worked with Mies on another iconic modernist project, the Seagrams Building in New York City. However, in the 1950s, he began to include certain playful and mannerist forms into his buildings, such as the Synagogue of Port Chester (1954–1956), with a vaulted plaster ceiling and narrow colored windows, and the Art Gallery of the University of Nebraska (1963). However, his major buildings in the 1970, such as IDS Center in Minneapolis (1973) and Pennzoil Place in Houston (1970–1976), were massive, sober, and entirely modernist.