Painted by Leonardo da Vinci in the early 16th century, the Mona Lisa is renowned for its incredible level of detail and realism, which were groundbreaking at the time. The subject of the painting, believed to be Lisa del Giocondo, the wife of a wealthy merchant named Francesco, is shown sitting in a relaxed pose, looking directly at the viewer with an enigmatic smile. This smile is perhaps the most intriguing aspect of the painting, interpreted in countless ways over the years - from a sign of happiness and contentment to a symbol of deceit or even a reflection of the subject's melancholy.