The Louvre Museum in Paris is preparing to unveil a restored painting unlike any other. In 2010 the museum began the restoration of Leonardo Da Vinci's Saint Anne, with the Virgin and the Child, an artwork which is more than 50 years old. The restoration was controversial, but Pierre Curie, who led the team, is convinced it was the right thing for the Louvre to do, and that it was done in the right way.