ca. 1500 Beatrice d'Este by Bartolomeo Veneto (Snite Museum of Art, University of Notre Dame - South Bend, Indiana USA)
Beatrice d'Este is portrayed wearing Italian Renaissance day dress. She lived from 1475-1497 so this is either a posthumous portrait or the circa 1500 in the date needs to be taken seriously. Beatrice d'Este's Wikipedia article is here.
The Wikipedia article for Bartolomeo Veneto is here.
Image made lighter by gogm.