This is from a painting in the Tomb of the Aurelii in Rome, 250 AD. According to Robert Drews (In Search of the Shroud of Turin: New Light on its History and Origins), “It is not known that the Aurelii were Gnostics, but they do seem to have been a para-Christian family, and in the first half of the third century there were a good many Gnostics in Rome.”