Pier Leone Ghezzi, ‘Giovanni Battista Piranesi’, 1750/1755, National Gallery of Art, Washington, D.C.
sheet: 30.1 x 21.4 cm (11 7/8 x 8 7/16 in.)  support: 48 x 37.9 cm (18 7/8 x 14 15/16 in.)

About Pier Leone Ghezzi