Duchess of Bari and later of Milan (1475–1497) who was the wife of the Milanese ruler Ludovico Sforza. LS in Italian, signed “Beatrudes,” one page, 8.25 x 11.25, 1493. Crisply-penned untranslated letter, signed along the bottom edge by Beatrice. Letter has been professionally silked on the reverse and has been encapsulated in Mylar. In very good condition, with intersecting folds, scattered light toning and soiling, light show-through from docketing on reverse, and several repaired areas of paper loss. An incredibly scarce offering of one of the most beautiful and accomplished princesses of the Italian Renaissance. RR Auction COA.