`  == Art historians at Pinocateca/Biblioteca Ambrosiana say it's a Leonardo ==  The official placard at the museum where this painting is held does not mention anything at all about de Predis.  I can't unearth any recent art historians who diagree with them.  At this point, since the museum is very specific about handprints/fingerprints, unless someone can find a way to work de Predis back into this article - this portrait, entitled simply ``Duchess of Milan`` is a Leonardo.  And yes, it is most likely a portrait given to Beatrice at her wedding, where Leonardo was the wedding designer and made party favors and was highly involved in all of it.LeValley `