Side by side, the pictures look noticeably different: The copy is significantly brighter and more colorful; even Mona Lisa's famously coy smile takes on a new cast. Enlarge this image ...

File photo: A copy of Leonardo da Vinci's Mona Lisa that was painted at the same time as the original in the same studio is displayed at the Prado Museum in Madrid Wednesday Feb. 1, 2012.

A "Mona Lisa" copy owned by Spain's Prado Museum was almost certainly painted by one of Leonardo da Vinci's apprentices alongside the master himself as he did the original, museum officials said ...

A "Mona Lisa" copy owned by Spain's Prado Museum was almost certainly painted by one of Leonardo da Vinci's apprentices alongside the master himself as he did the original, museum officials said ...

A copy of Leonardo da Vinci's "Mona Lisa" was painted by a pupil or follower of the artist at about the same time as the original was created, and is now considered the oldest known copy of the ...

MADRID - Spain's Prado Museum said Wednesday it has a copy of Leonardo da Vinci's "Mona Lisa" that one of his students painted in the studio where the masterpiece was completed.

The copy was discovered after conservators at the Prado removed black paint from what they believed was a replica of the ‘Mona Lisa’ created after Da Vinci’s death.

A French School copy of the Mona Lisa dating to 1600 is coming to auction at Artcurial this week. Here's what you need to know about it.

A faithful copy of Leonardo da Vinci's Mona Lisa dating from more than 400 years ago will go under the hammer at a Paris auction on Tuesday, months after another reproduction of one of the world's ...

A copy of Leonardo da Vinci's "Mona Lisa" was painted by a pupil or follower of the artist at about the same time as the original was created, and is now considered the oldest known copy of the ...