The Artist's Sister at a Window. Dated: 1869. Dimensions: overall: 54.8 x 46.3 cm (21 9/16 x 18 1/4 in.) framed: 75.6 x 67 x 9.5 cm (29 3/4 x 26 3/8 x 3 3/4 in.). Medium: oil on canvas. Museum: National Gallery of Art, Washington DC. Author: Berthe M