Christianity, the Renaissance, and the study of history; monasteries, friaries and nunneries in quattrocento Florence; lay patronage and observant reform in 15th-century Florence; the tree of life and the Holy Cross; Franciscan spirituality in the trecento and the quattrocento; penitence and the laity in 15th-century Florence; sacred mountains in Europe and America; Savonarola's preaching and the patronage of art; altarpieces and the requirements of patrons; art criticism and icon-theology.
