Mona Lisa
Today the "Mona Lisa" is considered the most famous painting in the world, but until the 20th century it was simply one among many highly regarded artworks.
Once part of King Francis I of France's collection, the "Mona Lisa" was among the first artworks to be exhibited in Louvre, which became a national museum after the French Revolution. From the 19th century Leonardo began to be revered as a genius and the painting's popularity grew from the mid-19th century when French intelligentsia developed a theme that it was mysterious and a representation of the femme fatale.
The Baedeker guide in 1878 called it "the most celebrated work of Leonardo in the Louvre", but the painting was known more by the intelligentsia than the general public.
The 1911 theft of the "Mona Lisa" and its subsequent return was reported worldwide, leading to a massive increase in public recognition of the painting. During the 20th century it was an object for mass reproduction, merchandising, lampooning and speculation, and was claimed to have been reproduced in "300 paintings and 2,000 advertisements". It has been said that the "Mona Lisa" was regarded as "just another Leonardo until early last century, when the scandal of the painting's theft from the Louvre and subsequent return kept a spotlight on it over several years."
Mona Lisa (Prado's version)
The origins of the "Prado's Mona Lisa" are linked to those of Leonardo's original, as both paintings were likely created simultaneously in the same studio. The first documentary reference was made in the 1666 inventory in the Galleria del Mediodia of the Alcazar in Madrid as "Mujer de mano de Leonardo Abince" ("Woman by Leonardo da Vinci's hand"). However, it is still unknown when the portrait entered the Spanish Royal Collection, though it could have been already in Spain in the early years of the 17th century. Since the Prado's founding in 1819, the replica has been part of its permanent collection, habitually displayed in the museum.