 Having inherited from his father in 1754 the château of Marigny-en-Orxois, near Château-Thierry, he became the same year "marquis de Marigny".In 1767, he married Julie Marie Françoise Filleul (1751-1822), the illegitimate daughter of Louis XV and Irène du Buisson de Longpré.The marquis de Marigny amassed an important collection of works of art at his various residences.