The Mona-Lisa is ehxibited at the Louvre in Paris. It is estimated by more than 100 million US dollars. Mona is short for Madonna Lisa Gerardini, who was wife of Francesco del Jiocondo of Firenze.

2nd theory says that it was Constansa Develos, who was named La Jaconda and was the mistress of Julianno de Medichi. The first buyer of Mona Lisa was Francis the 1st, king of France in 1517.

Amazingly enough - the king hung the painting in his toilet room.

Leonard Da Vinci's La Jaconda, better known as the smiling Mona Lisa, is by far the most exspensive art painting in world history. Why, really ? no obvious reason. It didn't make Da-Vinci a millionaire.