at center in pen and brown ink: CAESAR AUGUSTUS DIVI
Giuseppe Vallardi (his number, V.128, in red chalk on the verso). (sale, Christie's London, 6 July 1999, no. 7, as Antonio da Sangallo the Younger; unsold). (sale, Christie's Paris, 27 November 2002, no. 22, as Antonio da Sangallo the Younger; unsold). (sale, Christie's London, 12 December 2003, no. 305, as Antonio da Sangallo the Younger); to Jan Krugier; (sale, Sotheby's New York, 28 January 2015, no. 8, as North Italian School; unsold); purchased by NGA, 2015.
- Frommel, C. J. "Unbekannte Entwürfe Sangallos für di Gräber Leos X und Clemens VII" in Italia und Germania, liber amicorum Arnold Esch. Ed. Hagen Keller. Tübingen, 2001: p. 334-335, 357, fig. 20.