La Joconde nue or Monna Vanna is a 1514–1516 charcoal drawing with white highlights by the school of Leonardo da Vinci. It is a semi-nude portrait of a woman, 28-by-21 inch in size.^[1] The position of the subject's hands and body are almost identical to that of Leonardo's Mona Lisa, leading some experts to suggest this work may be a preparatory drawing for the famous painting.^[2] These experts identify this as an exceptionally fine work by a left-handed master, leading to speculation that it is the work of Leonardo himself.^[2] The work has been held by the Condé Museum in Chantilly, France, since 1862.^[2]

About twenty similar paintings of "nude Mona Lisas" are known; a famous one from da Vinci's school is the Donna nuda at the Hermitage in Saint Petersburg.^[1]