A series of drawings involving a cat being cuddled lend credence to the existence of his Madonna with a Cat; he also painted the Benois Madonna in addition to his most famous Madonna, the Virgin of the Rocks.  
Bernardo Bellincioni suggested that the title figure of one of his paintings "seemed to listen and not to speak", and the reverse of another of his portraits contains a juniper sprig and a motto translated as "Beauty is Virtue".  In addition to Cecilia Gallerani, the titular Lady with an Ermine, and Ginevra de' Benci, he depicted an emaciated figure holding a rock in his outstretched hand in a portrait of St. Jerome.  A series of drawings involving a cat being cuddled lend credence to the existence of his Madonna with a Cat; he also painted the Benois Madonna in addition to his most famous Madonna, the Virgin of the Rocks.  For 10 points, name this Italian who drew a Vitruvian Man and painted La Gioconda.
Bernardo Bellincioni suggested that the title figure of one of his paintings "seemed to listen and not to speak", and the reverse of another of his portraits contains a juniper sprig and a motto translated as "Beauty is Virtue".  
Leonardo {Da Vinci}