Daniel M. Zolli is a doctoral candidate in Harvard's History of Art and Architecture Department, where he is completing a dissertation on Donatello's workshops.
Amy R. Bloch is Assistant Professor of Art History at the University at Albany, State University of New York (SUNY). She has published essays on Ghiberti, Donatello, and the decoration of the Florence baptistery, and her book on Ghiberti's Gates of Paradise is forthcoming with Cambridge University Press.
Marco Ciatti is Superintendent of the Opificio delle Pietre Dure, an institution of the Italian Ministry of Culture and world leader in the field of art restoration. He is also director of the Opificio's Conservation Laboratory for Easel Paintings and Textiles and teaches history and theory of conservation.
Stefano Nicastri is an architect and art historian who has collaborated for many years with the Italian Ministry of Culture's Istituto Centrale per il Catalogo e la Documentazione in the areas of Renaissance and Baroque art and architecture.