The painting is probably of the Italian noblewoman Lisa Gherardini, the wife of Francesco del Giocondo, and is in oil on a white Lombardy poplar panel. Leonardo never gave the painting to the Giocondo family, and later it is believed he left it in his will to his favored apprentice Salaì. It had been believed to have been painted between 1503 and 1506; h
owever, Leonardo may have continued working on it as late as 1517. It was acquired by King Francis I of France and is now the property of the French Republic itself, on permanent display at the Louvre, Paris since 1797.
The Mona Lisa is one of the most valuable paintings in the world. It holds the Guinness World Record for the highest known insurance valuation in history at US$100 million in 1962 (equivalent to $870 million in 2021).