Adolf Friedrich Teichs, ‘Das Schloss am Meer (Castle on the Sea)’, 19th century, National Gallery of Art, Washington, D.C.
image: 2 7/16 x 3 3/4 in. (6.2 x 9.6 cm)  sheet: 6.8 x 10.2 cm (2 11/16 x 4 in.)  mount: 8 3/8 x 10 9/16 in. (21.2 x 26.8 cm)