Born Felice Peretti di Montalto (1521-1590) who served as Pope from 1585 to 1590. He was responsible for reforming the central administration of the church, instituting financial reforms to restore solvency to the papal states, completing Saint Peter’s dome and rebuilding the Vatican. LS in Italian, signed “Sixtus pp V.,” one page, 8 x 11, June 1586. The pope concedes the benefits of the diocese of Piacenza to Cardinal Lancelotto and allows him to name whatever officers he may need. Boldly signed at the conclusion by the Holy Father. Docketing on reverse of second integral page mentions Pope Gregory VIII, who Sixtus succeeded. Intersecting folds, and scattered light toning and foxing, otherwise fine condition. RRAuction COA.