around circumference in outer circle: MATHEMATICVS ET OMNIS HVMANITATIS PATER; around circumference in inner circle: PISANI PICTORISOPVS
Oscar Hainauer [d. 1894], Berlin; by inheritance to his widow, Mrs. Julie Hainauer, Berlin; purchased 1906 by (Duveen Brothers, Inc., London, New York, and Paris); by exchange 21 October 1920 to Joseph E. Widener, Lynnewood Hall, Elkins Park, Philadelphia; gift 1942 to NGA.
- A Cabinet of One Hundred & Thirty-Three Bronze Plaques and Medals of the Renaissance Period from the Collection of the Late Herr Oscar Hainauer of Berlin. Ed. Duveen Brothers. London, n.d. (but 1908): no. 26, repro.
- Pollard, John Graham. Renaissance Medals. The Collections of the National Gallery of Art Systematic Catalogue. 2 vols. Washington, 2007: 1:no. 19, repro.