X-ray photography. It revealed, among other things, that leaves have been added later to the laurel wreath on Domitian’s head. There is no trace of an underlying painting. High resolution images are available upon request.
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.