The Birth of Venus Dorotheus". Pliny also noted a second painting by Apelles of Venus "superior even to his earlier one," that had been begun by artist but left unfinished. The Roman images in various media showing the new-born Venus in a giant shell may well be crude derivative versions of these paintings. Botticelli could not have seen the frescos unearthed later in Pompeii, but may well have seen small versions of the motif in terracotta or engraved gems. The "House of Venus" in Pompeii has a life-size fresco of Venus lying in the shell, also seen in other works; in most other images
Portrait of a Man with a Medal of Cosimo the Elder resembles this. He is also sometimes claimed to be the subject of other Botticelli portraits, with completely different features (e.g. Pitti Palace, wearing a chaperon). The appearance at auction in 1982, from the Thomas Merton collection, of a rarely seen painting by Botticelli of a young man identified (with no real evidence) as Giovanni il Popolano in a similar pose, holding up a round medallion cut from a much older painting (albeit of a bearded saint, not Cosimo), has led to speculation that this might be a companion piece, and thus that the young man in this portrait is possibly