Leonello d’Este, 1407-1450, Marquess of Ferrara 1441 [obverse] by Pisanello https://www.nga.gov/artworks/44332-leonello-deste-1407-1450-marquess-ferrara-1441-obverse
Pisanello, who was a painter as well as a medalist, is generally credited with having invented the Renaissance medal form, as well as having brought it to its highest potential. He made several medals of the Marquess of Ferrara, this one being for the occasion of Leonello’s marriage to Maria of Aragon in 1444.
„La collection de M. Gustave Dreyfus, V: Les plaquettes.“