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.
Isleworth Mona Lisa
The Isleworth Mona Lisa is an oil-on-canvas painting of the same subject as Leonardo da Vinci's "Mona Lisa". In 2015 and 2016, peer-reviewed academic publications concerning it confirmed its attribution to Leonardo da Vinci.