 Peter Bunnell served as director until 1978, training a generation of leading scholars and curators of photography, and giving Princeton a preeminent place in the field with a collection in excess of 27,000 photographs, and significant archives of photographers including Clarence Hudson White, Minor White, and Ruth Bernhard.In 1980, Allen Rosenbaum became director, focusing on expanding the museums collection of Old Masters, notably Renaissance and Baroque paintings in the Mannerist tradition.In 1989, Rosenbaum oversaw another expansion of the museum's physical plant, the Mitchell Wolfson, Jr., Class of 1963, Wing.