[I] From the earliest times to the beginning of the renaissance period, including the methods and materials of the painter's craft of ancient and modern times.--II. Italian painting from the beginning of the renaissance period, including the work of the principal artists from Cimabue to the Pollaiuoli.--III. Italian painting of the fifteenth and sixteenth centuries, including the work of the principal artists of the Florentine, Umbro-Florentin, Paduan, Muranese, and Venetian (to the Vivarini and their followers) schools.--IV. Italian painting from the fifteenth to the eighteenth century, including the work of the principal artists and their followers of the vaious Italian schools not already treated in the previous volumes of this work.