The letter of Henry III (1574–1589), the last of Valois, addressed to the French ambassador in Rome at the papal court, seigneur de Saint-Goart (Gouart). The document was submitted to the Archive of the Saint Petersburg Institute of History of the Russian Academy of Sciences as a gift on April 14, 2024. This is an order to the ambassador to ask Pope Gregory XIII to approve the royal decision regarding the appointment of a new prior of the Augustinian priory in Perigord, Saint-Etienne Du Peyrat, a certain Elis Patrice. In preparation for a new civil war in France, which remained in history under the name The War of Three Henrys (1585–1589), the king placed in secular and church posts, at court and in the field, the persons who were certainly devoted to him. Henry III removed from the post of prior a supporter of the Dukes of Guise, political opponents of the king, Bishop of Amiens. The reconstruction of events, according to the dorsal notes on the back of the letter, allows to understand the dramatic history of the approval of the royal decision, which eventually took place in 1586. This was due to the expulsion of Saint-Goart from Rome on the orders of the new Pope Sixtus V, and his triumphant return a few months after the restoration of relations between Henry III and the Holy See, under a new name and in a new status, Marquis de Pisany.
