Hidden portrait found under Picasso masterpiece
17 June 2014 Last updated at 16:23 BST
Advances in infrared imagery have helped art experts to uncover a portrait which has been hidden under a Pablo Picasso painting since 1901.
It was found beneath Picasso's The Blue Room and features a bow-tied man with his face resting on his hands.
Curators and conservators in the US have spent the past five years developing a clearer image of the mystery man.