Mona Lisa
The painting is thought to be a portrait of Lisa Gherardini, the wife of Francesco del Giocondo, and is in oil on a white Lombardy poplar panel. It had been believed to have been painted between 1503 and 1506; however, Leonardo may have continued working on it as late as 1517. Recent academic work suggests that it would not have been started before 1513. It was acquired by King Francis I of France and is now the property of the French Republic, on permanent display at the Louvre Museum in Paris since 1797.
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.