She was an associate of Marie-Antoinette who left town fast enough to save her head, unlike the loyal Princesse de Lamballe. The Polignac family benefitted from her association with Marie-Antoinette. The Duchess Polignac's Wikipedia article is here.

1782 Yolande-Martine-Gabrielle de Polastron, duchesse de Polignac by Elisabeth-Louise Vigee-Lebrun (Châteaux de Versailles et de Trianon - Versailles, Île-de-France, France)
