[citation needed] In 1789 he was elected to the Estates-General by the noblesse of Amiens and Ham, but was compelled to resign in consequence of a duel with the commander of the National Guard of Versailles.
Returning to France in 1800, with the amnesty of Émigrés, he lived quietly at his residence in Mouchy-le-Châtel (Oise) during the Empire.
After the Bourbon Restoration, he again came into favor and in 1817 was created duc de Mouchy as a French title, thus becoming a Peer of France.
The court there meets with the French Academy, and people of arts and letters: Diderot, d'Alembert, Jean-François de la Harpe, Charles Pinot Duclos, Jean-François Marmontel, Jacques-Henri Bernardin de Saint-Pierre.
[3] The prince de Poix, in love with one of the chambermaids of the Queen, attends the coterie of Madam d'Angivilliers[4] and benefits from it to meet this young graduate in this living room of the street of the Oratory, in Paris.