Sketch of Beatrice d'Este by Leonardo Da Vinci 1495
La belle ferronnière by Leonardo da Vinci is believed either Lucrezia Crivelli or Beatrice d'Este
Lucrezia Crivelli was a mistress of Ludovico Sforza "il Moro", Duke of Milan. She was the mother of Sforza's son, Giovanni Paolo I Sforza, Marquess of Caravaggio. Crivelli has been thought to be the subject of Leonardo da Vinci's painting, La belle ferronnière.