Cellini, while employed at the papal mint at Rome during the papacy of Clement VII and later of Paul III, created the dies of several coins and medals, some of which still survive at this now-defunct mint. He was also in the service of Alessandro de Medici, first duke of Florence, for whom he made in 1535 a 40-soldi piece with a bust of the duke on one side and standing figures of the saints Cosima and Damian on the other. Some connoisseurs attribute to his hand several plaques, "Jupiter crushing the Giants," "Fight between Perseus and Phineus", a Dog, etc. Other works, such as the portrait bust shown, are not directly attributed but are instead attributed to his workshop.