The first major biography of one of France's most mysterious women--Marie Antoinette's only child to survive the revolution. Susan Nagel, author of the critically acclaimed biography Mistress of the Elgin Marbles, turns her attention to the life of a remarkable woman who both defined and shaped an era, the tumultuous last days of the crumbling ancien régime. Nagel brings the formidable Marie-Thérèse to life, along with the age of revolution and the waning days of the aristocracy, in a page-turning biography that will appeal to fans of Antonia Fraser's Marie Antoinette. In December 1795, at midnight on her seventeenth birthday, Marie-Thérèse, the only surviving child of Marie Antoinette and Louis XVI, escaped from Paris's notorious Temple Prison. To this day many believe that the real Marie-Thérèse, traumatized following her family's brutal execution during the Reign of Terror, switched identities with an illegitimate half sister who was often mistaken for her twin.