It's probably the most recognizable painting in the world! Do you know when Leonardo da Vinci painted the Mona Lisa? The painting is a portrait of Lisa Gherardini, the wife of Francesco del Giocondo. Mona Lisa's subtle smile is the distinguishing feature of this painting, you just can't help but wonder what she's thinking. Pick your answer below and see if you're correct. Don't forget to share this trivia question on your social media and leave us a comment below, too!