Horsemen and Herdsmen with Cattle. Dated: 1655/1660. Dimensions: overall: 120 x 171.5 cm (47 1/4 x 67 1/2 in.) framed: 164.2 x 214.3 x 17.2 cm (64 5/8 x 84 3/8 x 6 3/4 in.). Medium: oil on canvas. Museum: National Gallery of Art, Washington DC. Autho