This sixth volume in the series "Studies in Modern Art" focuses on the architect Philip Johnson and his long association with The Museum of Modern Art, with essays examining his roles as patron, as curator, and as the institution's unofficial architect from the late 1940s to the early 1970s. Kirk Varnedoe (Chief Curator, Department of Painting and Sculpture) presents an overview of the significant donations made by Johnson to the Museum collections between 1932 and 1996, among which is a group of key paintings and sculptures from the 1960s by Robert Rauschenberg, Andy Warhol, Claes Oldenburg, Roy Lichtenstein, and Frank Stella. Terence Riley (Chief Curator, Department of Architecture and Design) provides a critical analysis of the landmark exhibitions Johnson organized for the Museum, and their formative influence on the fields of modern architecture and design.