[1][2][3] Chalgrin is the daughter of French painter Claude-Joseph Vernet and Virginia Parker.

During the Terror, Rosalie committed the imprudence of entrusting a junk dealer with several pieces of furniture from the Château de la Muette, unaware that they bore the royal mark.

[citation needed] Marguerite was denounced to the General Security Committee and, caught red-handed at her second-hand dealer, was accused of complicity in theft and concealment of objects belonging to the Republic.

[citation needed] She was accused of "burning the candles of the nation," found guilty, and sentenced to death by the Revolutionary Tribunal.

She was guillotined in the Place du Trône-Renversé on 24 July 1794, three days before the wedding of her daughter Louise-Josèphe.