Roberta J.M. Olson is Professor Emeritus of Art History at Wheaton College in Massachusetts. She has worked as Curator of Drawings at the New-York Historical Society for seven years.

Patricia L. Reilly is Assistant Professor of Art History at Swarthmore College. She is currently finishing a book on Raphael, Giorgio Vasari and the development of what she terms the 'Florentine Visual Vernacular'.

Rupert Shepherd is based in the Department of Western Art at the Ashmolean Museum. His previous employment included two years as a research fellow at the University of Sussex, working on the collaborative project The Material Renaissance: Costs and Consumption in Italy c.1300-1650.