Mr.Piccirillo studied the painting and saw that the Mona Lisa's hand is bent awkwardly at the wrist,and a swirling serpent shape lurks in the background behind her. He also compares the lion's head to a passage which reads that artists trying to paint envy must "give her a leopard's skin,because this creature kills the lion out of envy and by deceit". Mr.Piccirillo also claims to have found similar hidden images in the works of other Renaissance painters includ ing Titian and Rafael.Mr. Piccirillo studied the painting and saw that the Mona Lisa’s hand is bent awkwardly at the wrist, and a swirling serpent shape lurks in the background behind her. He also compares the lion’s head to a passage which reads that artists trying to paint envy must "give her a leopard's skin, because this creature kills the lion out of envy and by deceit". Mr. Piccirillo also claims to have found similar hidden images in the works of other Renaissance painters including Titian and Rafael