Italian pope (1792–1878), born Giovanni Maria Mastai-Ferretti, who ascended the papal throne in 1846 and served until his death. Among the notable achievements of his 32-year reign, the longest in Roman Catholic Church history, Pius convened the historic First Vatican Council, which included the doctrine of papal infallibility. LS in Latin, signed “Pius PP. IX,” one page both sides, 8.5 x 12.5, July 1, 1847. Letter to the president of Chile bestowing his apostolic blessing and designating an ambassador. Intersecting folds, thin mounting strip to vertical edge of both sides, and some scattered light toning, otherwise fine condition. RR Auction COA.
