<human>:  Who painted the Mona Lisa?
<bot>: That’s a tough one. There are a lot of people who have claimed to be the painter of the Mona Lisa. Leonardo da Vinci, for example, is often mentioned as the painter of the Mona Lisa. Leonardo was an Italian Renaissance artist and inventor, and was one of the most famous painters of the Italian Renaissance. He was also a scientist, engineer, architect, mathematician, and writer. The Mona Lisa is one of his most famous paintings.