<p>The almost invisible images of a hitherto unknown painter called Eusebius, who worked in San Vitale Ravenna and in Vivarium, are a gallery of portraits of his famous contemporaries such as Theodoric, Vitiges, Amalasunta and a visual commentary of Justinian's tyrannical behaviour. Living between two ages, without belonging to either, this solitary man represents the fullest embodiment of a type of cultural "hybridisation" that is well attested ...