The Mysteries of Leonardo's Mona Lisas...
A nude sketch that bears a striking resemblance to the Mona Lisa may have been drawn by Leonardo da Vinci, experts have said.
Scientists at the Louvre in Paris, where the painting is held, have been examining a charcoal drawing known as the Monna Vanna, which had been attributed to the Florentine master’s studio.
Read the story behind the history...Saving Mona Lisa