What are some myths surrounding the Mona Lisa, painted by Da Vinci? I am trying to finish this study guide for one of my exams and the last question is...

Among the
myths, legends and uncertainties that surround Leonardo da Vinci's Mona
Lisa--the most famous painting in the world:

• The
  background of the painting was influenced by Chinese art.
• Leonardo, as well
  as his mother, had earlier been rumored as the original sitter.
• At one
  time, the painting was believed to have been altered in size; historians now believe
  otherwise.
• At one point it...