Cardinal Mazarin
The Grimaldi fortunes were restored when descendants of both Hortense Mancini and Louis I married: Louise d'Aumont Mazarin married Honoré III's son and heir, the future Honoré IV. This marriage in 1776 was extremely advantageous to the Grimaldi, as Louise's ancestress Hortense Mancini had been the heiress of Cardinal Mazarin. Thus Monaco's ruling family acquired all the estates bequeathed by Cardinal Mazarin, including the Duchy of Rethel, and the Principality of Château-Porcien.