Copy of 'Mona Lisa' draws crowds

Crowds gathered at Madrid's Prado Museum this week to view a copy of the "Mona Lisa" for the first time since restoration revealed it was almost certainly painted by one of Leonardo da Vinci's apprentices as he worked on the original.

The painting is on display until March 13, after which it will move to Paris' Louvre museum to hang alongside the original as part of an exhibition on da Vinci's work.

Although the precise painter of the copy has not been determined, both the Prado and Louvre believe it is probably the earliest known copy of "La Gioconda," as the painting is also known. The Prado described it as "the most important version known to date of Leonardo's emblematic painting."

Hours after opening Tuesday, dozens of people packed the area around the work to try to get a closer look.