Hidden portrait 'found under Mona Lisa': French scientist

French scientist Cotte says he has found an image of a portrait underneath the existing Mona Lisa painting using reflective light technology

French scientist discovers a hidden painting under the Mona Lisa

Beneath the Mona Lisa Lies a Second Portrait, Scientist Claims

Mona Lisa': Hidden portraits 'found underneath

Scientist Discovers Hidden Portrait Beneath The Mona Lisa

Hidden portrait 'found under Mona Lisa', says French scientist

Mona Lisa': Hidden portraits 'found underneath

Mona Lisa Underdrawing Researchers Discover a Hidden Drawing Behind 'Mona Lisa

Researcher Says Mona Lisa May Be Covering Hidden Painting

Mona Lisa': Hidden portraits 'found underneath