She won a two-year Fulbright Fellowship in 1954, which led to her meeting with a young opera student, Anna Moffo, who became her lifelong friend.

Her later books include: Dynasty and Destiny in Medici Art; Bronzino's Chapel of Eleonora in the Palazzo Vecchio; The Collections of Francois I: Royal Treasures; and Giulio Romano.

[2] She taught at Wellesley College, then soon after graduation worked as a curator in the Department of Prints and Drawings of the Art Institute of Chicago.

She then became a lecturer at the Frick Collection before being hired, on the recommendation of Leo Steinberg, to teach Italian Renaissance art at Hunter College.

[3] She remained at Hunter College for over forty years, and later taught at the Graduate Center of the City University of New York.