Bona Sforza (1493-1557), Queen of Poland. Culture: Polish, Krakow cameo with French frame. Dimensions: Overall: 2 13/16 x 1 3/4 in. (7.2 x 4.4 cm); Visible cameo (confirmed): 31 x 22 mm. Maker: Cameo by Giovanni Jacopo Caraglio (Italian, Parma or Ver