gives more than just an enigmatic stare in the Leonardo Da Vinci's most famous work of art.The 500-year-old masterpiece has long been steeped in mystery and now a sequence of numbers and letters hidden within those famously enigmatic eyes.
The numbers and letters are not visible to the human eye but have to be viewed under a microscope.In the right eye appear to be the letters LV which could well stand for his name Leonardo Da Vinci while in the left eye there are also symbols but they are not as defined.It is difficult to make them out but they appear to be the letters C and E or B.
"To the naked eye the symbols are not visible but with a magnifying glass they can clearly be seen.
We know Da Vinci used symbols so we are confident that they are a message from him" said Silvano Vinceti, president of Italy's National Committee for Cultural Heritage.
Luigi Borgia, a member of the National Committee for Cultural Heritage in Italy, who found the signs told:
"We are only at the start of this investigation and we hope to be able to dig deeper into this mystery and reveal further details as soon as possible. It's remarkable that no-one has noticed these symbols before and from the preliminary investigations we have carried out we are confident they are not a mistake and were put there by the artist."
The Mona Lisa is an oil on panel painting owned by the French government and is known in Italy, where it was painted, as La Gioconda. The image is so widely recognised and caricatured that it is considered the most famous painting in the world. Da Vinci started to paint it in 1503 or 1504 and finished it in 1519, shortly before his death, and after he had moved to France.