Louis Marie Florent du Châtelet

Louis-Marie-Florent de Lomont d'Haraucourt, marquis later duc du Châtelet (20 November 1727, Semur-en-Auxois – 13 December 1793, Paris), was an aristocratic French Army general and diplomat of the Ancien Régime.

The Marquis and Marchioness produced three children: Françoise-Gabrielle-Pauline, married in 1743 to Alfonso Carafa, Duca di Montenero, Louis-Marie-Florent and Victor-Esprit.

The Duke adopted his wife's niece instead, also called Diane-Adélaïde, who was daughter of François-Jacques de Damas, marquis d'Antigny.

In 1787 Châtelet was appointed to preside over the provincial assembly of the Ile-de-France, one of a number called to consider political and economic reform.

At the same time he neglected to enforce greater professionalism amongst the aristocratic officer corps, who were often absent on leave and who left day-to-day administration of the regiment to its sergeants and corporals.