Jean-Jacques de Boissieu, ‘Thirteen Studies of Heads’, 1770, National Gallery of Art, Washington, D.C.
plate: 23.9 x 18 cm (9 7/16 x 7 1/16 in.)  sheet: 30.6 x 23.5 cm (12 1/16 x 9 1/4 in.)

About Jean-Jacques de Boissieu