The 100 million dollar question - Leonardo da Vinci - true or false ???

Leonardo da Vinci

La bella principessa (Bianca Sforza or Beatrice d'Este )

 

For the answer of the 100 million dollar question please look here:

1) www.3pipe.net/2011/07/enhancing-art-of-seeing-leonardo-ca...

or here

2) lunday.com/?p=1070

or

3) www.hydramag.com/2010/07/25/art-lies-and-spectral-cameras/

or here

4) en.wikipedia.org/wiki/Portrait_of_a_Young_Fianc%C3%A9e

Done