Could a nude portrait be a precursor to the Mona Lisa?<br /><br />The Mona Lisa has always been shrouded in mystery — and a new detail adds to the portrait's intrigue. Some experts believe a nude portrait known as the "Monna Vanna," which bears a striking resemblance to the famous portrait, could be a precursor to that famous painting. <br /><br />Recent tests on the nude portrait indicate that Leonardo Da Vinci drew at least part of it. Small holes around the figure suggest it was used as a tracing for a canvas painting. <br /><br />So, could it be the Mona Lisa? Only she knows the answer to this mystery.
