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.
Salvator Mundi (Leonardo)
Referred to as the "Last da Vinci", "Salvator Mundi" was the only known painting by Leonardo still in private hands. Fewer than twenty other known works by Leonardo are held in museums around the world, including the "Mona Lisa" and "The Last Supper". The only work by Leonardo in North America, "Ginevra de' Benci", is held at the National Gallery of Art in Washington, D.C. The museum purchased "Ginevra" in 1967 for $5 million in a private sale (equivalent to approximately $36.4 million in 2017), a world record at the time. "Salvator Mundi" is the first painting by the artist to appear in a public sale for 100 years.