A Leonardo Di Vinci masterpiece.. or just an inferior copy? Mystery over the 'Isleworth Mona Lisa' as it goes on display in Turin, with experts divided over whether the painting of a 'younger, happier' Mona Lisa really is by the Italian master | Daily Mail Online

The so-called Isleworth Mona Lisa spent more than two centuries in England before being hidden for decades in a vault in Switzlerland. Now it is being exhibited at an exhibition in Turin.