The small bridge rarely open to the public serve to link the duke's private apartments.It was made by the archistar from Urbino BRAMANTE (1444-1514) and the genius LEONARDO DA VINCI (1452-1519).It was commissione by the duke of Milan LUDOVICO IL MORO (1452-1508) find his shelter after the dead of her love BEATRICE D'ESTE (1475-1497).The duke was so frantic for the premature dead of the young wife.