Stefano Della Bella, ‘Black Groom with an Arabian Horse’, 1649/1650, National Gallery of Art, Washington, D.C.
plate (oval): 10 x 7.4 cm (3 15/16 x 2 15/16 in.)  sheet: 10.8 x 8.2 cm (4 1/4 x 3 1/4 in.)

About Stefano Della Bella