Giorgio Sommer, ‘Impronte umane (Pompeii)’, 1873, National Gallery of Art, Washington, D.C.
image: 19.7 x 24.6 cm (7 3/4 x 9 11/16 in.)  sheet: 20 x 24.6 cm (7 7/8 x 9 11/16 in.)

About Giorgio Sommer