Signature photomicrographs Click to enlarge Click to enlarge Under construction Roman emperor Domitian, Leonardo da Vinci, Titian, Tizian, Tiziano Vecellio, Roman emperors, Eleven Caesars, Undici Cesari, Domitianus, Isabella d’Este, Federico II Gonzaga, Mantova, Mantua, Italy, Francis I, Amboise France, Charles I England.