Focus on Portrait of Carlo de' Medici and explore the History.
Little is known about the painting's origins, and currently the most credited hypothesis is that it would portray Carlo de' Medici, an illegitimate son of Cosimo de' Medici the Elder and a Circassian concubine, as hinted by the subject's intense blue eyes. In 1912 a copy of the portrait was included in a genealogy of the House of Medici.  This is however in contrast with the identification of Carlo as a character in Filippino Lippi's Stories of St. Stephen and St. John the Baptist in the Cathedral of Prato. Also the attribution to Mantegna was not immediate, as for a long time the painting was thought to be by Domenico Veneziano. 
The work has been dated from 1459–1460, when Mantegna arrived in Mantua and was commissioned numerous official portraits  (the subject has been also identified as  Ludovico Gonzaga, bishop of Mantua), and 1466, when the painter perhaps travelled to Florence.
Florence Carlo de' Medici Filippino Lippi Cathedral of Prato Cosimo de' Medici the Elder Circassian House of Medici Mantua Stories of St. Stephen and St. John the Baptist Domenico Veneziano Cosimo de' Medici