These days people line up for hours to see Leonardo Da Vinci's Mona Lisa. But at one stage there were so few viewers that she was remarkably easy to steal. In fact, for a while, no one even noticed she was gone... This is the story of the sensational crime that turned a portrait into a legend. Guest: Mary McGillivray - art historian and content creator.Get in touch:Got a story for us? We'd love to hear from you! Email us at
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