Experts at the Louvre museum in Paris on Thursday revealed that Leonardo da Vinci may have also painted a topless version — called Joconde Nue, or Monna Vanna — of the famed masterpiece. A scientific study of the charcoal work found that it could be Da Vinci’s preparatory drawing for a naked version of La Gioconda. The Monna Vanna — which has been held since 1862 at the Condé museum in Chantilly — had previously been attributed to the Florentine master’s studio.