Claire Farago (Ph.D., 1988) is Professor of Renaissance Art, Theory, and Criticism at the University of Colorado Boulder. Her books include Leonardo da Vinci’s Paragone (1992); Reframing the Renaissance: Visual Culture in Europe and Latin America, 1450-1650 (1995); Leonardo da Vinci: Selected Scholarship in English, 5 vols. (1999); Leonardo da Vinci and the Ethics of Style (2008); Re-Reading Leonardo: The Treatise on Painting across Europe 1550-1900 (2009); and Art Is Not What You Think It Is, co-authored with Donald Preziosi (2012). Janis Bell (Ph.D., 1983) is an independent scholar. She has published widely on early modern art and art theory, particularly on Leonardo da Vinci, Matteo Zaccolini, Raphael, Caravaggio, Cassiano dal Pozzo, and on the legacy of ancient and medieval optical theory. She is contributing co-editor (with Thomas Willette) of Art History in the Age of Bellori (2002). Carlo Vecce (Ph.D., 1986) is Professor of Italian Studies at the University of Naples “L’Orientale.” He is a widely published scholar of Italian literature and Renaissance culture. He is co-author of the critical edition of Leonardo’s Book on Painting (1995); editor of the Codex Arundel (1998); and author of a biography of Leonardo (1998; rev. ed. 2006), which has been translated into several languages.