Antoine François Sergent after Joseph Siffred Duplessis, ‘Monsieur Frère du Roi (The King's Brother)’, 1789, National Gallery of Art, Washington, D.C.
image: 20.3 x 14.2 cm (8 x 5 9/16 in.)  sheet: 20.9 x 14.7 cm (8 1/4 x 5 13/16 in.)