Study for the Age of Bronze, 1637, Pen and brown ink, brush and brown wash, over black chalk, 15-15/16 x 10-5/8 in. (40. 5 x 27. 0 cm), Drawings, Pietro da Cortona (Pietro Berrettini) (Italian, Cortona 1596?1669 Rome), A masterpiece of Italian Baroque painting, Pietro da Cortona's ?Age of Bronze? in the Camera della Stufa at Palazzo Pitti (Florence) represents a scene of Roman military triumph with elusive allegorical meanings