Martino Rota, ‘Alexander de Medicis and Cosmo de Medicis’, National Gallery of Art, Washington, D.C.
plate: 17 x 17 cm (6 11/16 x 6 11/16 in.)  sheet: 17.7 x 17.7 cm (6 15/16 x 6 15/16 in.)

About Martino Rota