The belief that Leonardo da Vinci's Mona Lisa is a portrait of his mother, Lisa Gheradini, is actually a myth or misconception. The painting is not a depiction of his mother, but rather a portrait of a woman from Florence named Lisa del Giocondo. Lisa del Giocondo was the wife of a wealthy merchant, Francesco del Giocondo, and the painting is believed to have been commissioned by him. Therefore, the statement that the Mona Lisa is a portrait of da Vinci's mother, Lisa Gheradini, is false.
