Cosimo III, Grand Duke of Tuscany. Dated: before 1691. Dimensions: plate: 35.1 x 24.8 cm (13 13/16 x 9 3/4 in.) sheet: 37.1 x 26.8 cm (14 5/8 x 10 9/16 in.). Medium: engraving on laid paper. Museum: National Gallery of Art, Washington DC. Author: Adr