Related to the fresco in the Sala di Troia in the Palazzo Ducale, Mantua, painted in 1538 by Giulio's assistant Rinaldo Mantovano, F. Hartt, Giulio Romano, New Haven, 1958, II, fig. 385. The present drawing corresponds closely with a drawing in the British Museum, P. Pouncey and J.A. Gere, Raphael and his Circle, London, 1962, I, no. 88, II, pl. 81