Mona Lisa (also known as La Gioconda or La Joconde) is a 16th-century portrait. It was painted in oil by Leonardo da Vinci during the Renaissance in Florence, Italy. Many people think Mona Lisa's smile is mysterious. Because it is so often studied, recognized, and copied, it is considered to be the most famous painting in the world. The Louvre says that about 80 percent of its visitors come to see the painting of Mona Lisa. According to art experts, the Mona Lisa is the best known, most visited, and overall most famous work of art in the entire world.