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

No, this isn’t the plot of a Nicolas Cage movie. A special camera went deep into the famous painting
A special camera went deep into the famous painting's nooks and crannies. 

The little white attic : Speculation about Mona Lisa

PDF) Mona Lisa: A Comparative Evaluation of the Different Versions and Their Copies

The Mona Lisa - The Collection - Museo Nacional del Prado, monalisa

Clue shows Leonardo 'traced' Mona Lisa

Is There a Hidden Drawing Beneath the 'Mona Lisa'?, monalisa

Researchers Have Discovered a Hidden Drawing Behind 'Mona Lisa

Mona Lisa — Discovering da Vinci, monalisa

Hidden Drawing Discovered Beneath 'Mona Lisa

Louvre and Prado Mona Lisas

Is There a Hidden Drawing Beneath the 'Mona Lisa'?, monalisa

The Mona Lisa - The Collection - Museo Nacional del Prado, monalisa