The Sacrifice of Marcus Curtius. Dated: 1640s. Dimensions: Overall: 18.1 x 28.9 cm (7 1/8 x 11 3/8 in.) support: 26 x 37.3 cm (10 1/4 x 14 11/16 in.). Medium: black chalk on laid paper. Museum: National Gallery of Art, Washington DC. Author: Franz Cl