around circumference:in outer circle: MATHEMATICVS ET OMNIS HVMANITATIS PATER; around circumference in inner circle: PISANI PICTORIS OPVS
(Aimé Charles) Horace His de la Salle [1795-1878], Paris; (his estate sale, Sotheby's, London, 22-25 November 1880, 1st day, no. 24); Gustave Dreyfus [1837-1914], Paris; his heirs; purchased with the entire Dreyfus collection 9 July 1930 by (Duveen Brothers, Inc., London, New York, and Paris); sold 31 January 1944 to the Samuel H. Kress Foundation, New York; gift 1957 to NGA.
- Barstow, Kurt, ed. The Gualenghi-d'Este Hours: Art and Devotion in Renaissance Ferrara. Exh. cat. J. Paul Getty Museum, Los Angeles, 2000: 62, fig. 33.
- Pollard, John Graham. Renaissance Medals. The Collections of the National Gallery of Art Systematic Catalogue. 2 vols. Washington, 2007: 1:no. 18, repro.