Princess of France (1476–1531) and mother of King Francis I, she served twice as the regent of France in the early 16th century. Rare manuscript LS, with autograph subscription in French, to the Duke of Urbino, one page, 8.25 x 9.5, December, 1518. An interesting letter between heads of State, in which the Princess addresses the Duke as “Mon Cousin.” In very good condition, with intersecting folds (one horizontal fold passing through the signature), and scattered marks and foxing. RR Auction COA.