Mona Lisa replicas and reinterpretations
After restoration, the Prado's "Mona Lisa" revealed details covered by previous restorations and layers of varnish.
Furnishings and fabrics were enhanced, as well as landscape and facial features.
It is anticipated that such revelations may offer further insight into Leonardo's original.
Experts at the Louvre reportedly supported the Prado museum's findings.
The Prado replica was subsequently transported to the Louvre in 2012 to be displayed next to "Mona Lisa" as part of a temporary exhibition.
Two nude paintings bearing similarities to Leonardo da Vinci's original were part of a 2009 exhibition of artwork inspired by "Mona Lisa".
Displayed at the Museo Ideale in Leonardo's hometown of Vinci, near Florence, some believe one of the paintings – dating from Leonardo's time – to be the work of Leonardo himself, and it has at times been credited to him.
Other experts theorize the painting, one of at least six known to exist, may be just another copy painted by "followers" of Leonardo.
Scholarly dispute persists as to artist, subject and origin.
The nude in question, discovered behind a wall in a private library, reportedly belonged to an uncle of Napoleon Bonaparte, who owned another of Leonardo's paintings.
Facial features bear only vague resemblance, but landscape, compositional and technical details correspond to those of the "Mona Lisa" known worldwide today.
Mona Lisa replicas and reinterpretations
Contemporary "Mona Lisa" replicas are often created in conjunction with events or exhibitions related to Leonardo da Vinci, for publicity.
Her portrait, considered public domain and therefore outside of copyright protection, has also been exploited to make political statements.
Known even to people with no art background, the mere use of "Mona Lisa"'s name – immortalized in Academy Award-winning lyrics sung by Nat King Cole (Best Original Song, 1950) – is capable of stirring public interest and intrigue.
Aside from countless print-reproductions of Leonardo's original "Mona Lisa" on postcards, coffee mugs and T-shirts, her likeness has also been re-imagined using coffee, toast, seaweed, Rubik's Cubes, and computer chips, to name only a few.
Now over five-hundred years since her creation, the perpetuation of "Mona Lisa"'s influence is reinforced with every reinterpretation.