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)
Previous to its restoration, the painting was catalogued as an anonymous copy from the first quarter of the 16th century. However, it usually hung in the Prado alongside masterpieces of Italian artists such as Raphael or Andrea del Sarto; a lithography of the painting also exists, which is unusual for an anonymous copy.