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La Bella Principessa.


La Bella Principessa shown in thirteen multispectral images, plus reconstructed scans in false color and infrared daylight.


A close-up of the eye, which reveals Leonardo’s signature technique.


The enlargement allows a clear view of Leonardo’s typical left-handed hatching around the profile and in the background.


Pascal Cotte’s measurement of the head and face shows Leonardo’s impeccable specifications.


Leonardo’s typical pentiments are shown in La Bella Principessa.


Leonardo’s intricate knot patterns are in evidence on the image of La Bella Principessa.


Detail of the pentiments behind the sitter’s head, showing areas of the artist’s erasures—typical of Leonardo.


Close-up of a portion of the hair and headdress, showing the intricate detail.


Location of Leonardo’s fingerprint.


Pascal Cotte found numerous comparisons between Leonardo’s Lady with an Ermine and La Bella Principessa. In particular, he noted remarkable similarities in the anatomical structure of the eyes.


Pascal Cotte (left) prepares to use his revolutionary multispectral imaging camera to photograph the Mona Lisa in a private room in the basement of the Louvre.


Pascal and Martin examine the place in the Sforziada showing the missing page and the protruding remnant and find a match for La Bella Principessa. photo by permission of lumiere technology and martin kemp.


Circles and arrows mark three holes showing that the image was once part of a codex or manuscript.


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