Could one of Leonardo da Vinci’s lost works of art be hidden between a wall of an ornate building and another masterpiece?  It’s a captivating theory that has had one prominent scientist chasing a legend for more than 30 years. This is the exclusive behind-the-scenes story of the hunt for a priceless masterpiece that could lead to one of the greatest discoveries the art world has ever known.

Source: Natgeotv.com