A descendant of one of the oldest families in Normandy, Jacques III de Matignon (1644-1725) had three children, including Jacques de Goyon-Matignon who married Louise-Hippolyte Grimaldi in 1715, eldest daughter and heiress of Prince Antoine I of Monaco. Recognized as Prince of Monaco on the death of his wife, under the name of Jacques I, he brought into the House of Grimaldi the possessions and titles inherited from his father Jacques III de Matignon, including the county of Torigni, the baronies of Saint-Lô, de la Luthumière, Hambye, Moyon, Plessis-Grimoult, and La Roche-Tesson. Torigni Castle was one of the favorite residences of the princes of Monaco until the end of the Ancien Régime. Likewise, the Hôtel Matignon, which Jacques III had acquired in 1723, was their Parisian residence in the 18th century.
