l~Etude entartre le Sforza-Reiterstandbild Study fur the Sforza-Reiterstandbild
mk137 ca.1485-1490 charbon et le crayon en métalBibliothèque Royale, le Château de Windsor mk137
ca.1485-1490 charcoal and metal pencil Royal Library, Windsor Castle
Italian High Renaissance Painter and Inventor, 1452-1519