His book, Fra Angelico at San Marco, published by Yale University Press, won the 1993 George Wittenborn Memorial Book Award, the 1994 Eric Mitchell Prize and was a finalist in the Premio Salimbeni Competition in Italy.
His book-in-progress is entitled Made Men: Afterlives of the Classical Nude.
He has taught at Oberlin College since 1974 and holds the endowed Mildred C. Jay professorship in art history.
He is a fellow at the American Academy in Rome, as well as the Harvard University Center for Italian Renaissance Studies at the Villa I Tatti[1] in Florence, where he held two visiting professorships from 1989–90 and from 1999-2000.
He is also a 2005 recipient of an Andrew W. Mellon fellowship at the Metropolitan Museum of Art in New York City.