Niccolò Circignani,

Study for the Duel between Heraclius and Khosrau (recto); Sketches of Seated Figure (verso)

1582

Pen and brown ink, with brush and pale brown wash, with black chalk (recto) and black chalk (verso), on ivory laid paper

27.5 × 26.6 cm (10.8 × 10.5 in)