Mona Lisa copy goes on show in Madrid's Prado Museum
21 February 2012 Last updated at 18:28 GMT
A copy of Leonardo Da Vinci's Mona Lisa, believed to have been painted at the same time as the original, has gone on display at Madrid's Prado museum.
The work, which has just been fully restored, is thought to have been painted by a Da Vinci assistant.
Gabriele Finaldi, the Prado Museum's deputy director of collections said the painting gives an understanding of how Leonardo worked.