Art and politics in 14th- and 15th-Century Tuscany; civic religion in the Tuscan City-states; art and patronage in the Italian Renaissance court.
Monograph on the painter Lippo di Dalmasio (forthcoming);
essays/articles/reviews in the Burlington Magazine, Renaissance Studies, Fifteenth Century Studies, Mitteilungen des Kunsthistorischen Institutes in Florenz;
Major contributor to the Oxford Companion to Western Art, the Encyclopedia of the Renaissance, Medieval Italy: An Encyclopedia, and the Oxford Dictionary of the Middle Ages.
Courses on late Medieval and early Renaissance Art History