Affair of the Diamond Necklace
In 1785, she unsuccessfully appealed on her knees to the queen, despite her dislike for the latter, to show mercy to her nephew the cardinal de Rohan, who was implicated in the famous Affair of the Diamond Necklace. She appeared in court during the case against Louis de Rohan alongside the rest of the Rohan clan, dressed in black, and when the judges arrived, she reportedly rose and proclaimed: "Messieurs, you have come to judge us all!"