Seems this painting is the obsession of generations of artists and scientists. A team of scientists from Canada's National Research Council has now
created a 3-D digital model of the "Mona Lisa" — a highly detailed computer scan of what may be the most famous painting in history.
Bruno Mottin of the French Museums' Center for Research and Restoration said that on very close examination of the painting it became clear that the
Mona Lisa's dress was covered in a thin transparent gauze veil.
This type of gauze dress ... was typical of the kind worn
in early 16th century Italy by women who were pregnant or who had just given birth. This is something that had never been seen up to now because the
painting was always judged to be dark and difficult to examine.
We can now say that this painting by Leonardo da Vinci was painted to commemorate the birth of the second son of the Mona Lisa, which helps us to date
it more precisely to around 1503.