Johann Heinrich Keller, ‘Diana and Endymion’, 1765, National Gallery of Art, Washington, D.C.
Overall: 19.5 x 24.8 cm (7 11/16 x 9 3/4 in.)  mount: 30 x 40.4 cm (11 13/16 x 15 7/8 in.)

About Johann Heinrich Keller