The true story of the Mona Lisa, Leonardo da Vinci's masterpiece. A portrait which was to adorn the main room of the home of a great Italian family, the Giocondo, who commissioned the painting, but which the painter never gave them.

Who was Monna Lisa, the model for the MonA Lisa? Why is his smile fascinating? Under what conditions did Leonardo da Vidci create the most famous painting in the world? To talk about it, Stéphane Bern receives Vincent Delieuvin, art historian, chief curator in charge of 16th century Italian painting at the Louvre Museum.