Leonello commissioned Piero della Francesca to paint frescos of well known Roman battles, in particular the battles between the Roman general Scipio and the Carthaginian general Hannibal. Leonello's interest in Roman Antiquity had to do with his education and exposure to humanism under the instruction of his tutor Angelo Decembrio. Leonello would at times bring in artists from the Low Countries. The bringing in of Flemish artists has prompted a debate over whether Piero possibly appropriated from Flemish artists. Piero would have had contact with some of them, such as Rogier van der Weyden, who was in Ferrara in the 1440s, during the period of Leonello's reign.