He is a professor of Art History at Queens College, CUNY, and has also taught at Vassar, Columbia, and the Art History Program at the CUNY Graduate Center. His recent book on art and performance, The Medici Wedding of 1589: Florentine Festival as "Theatrum Mundi" (Yale, 1996), received the Phyllis Gordon Prize from the Renaissance Society of America. His previous publications include The Poetry of Michelangelo: An Annotated Translation (1991) and Ganymede in the Renaissance: Homosexuality in Art and Society (1986). Specializations: Renaissance Art and Theatre.