Jeanne Bécu , comtesse du Barry ( 19 August 1743 -- 8 December 1793 ) was the last `` Maîtresse-en-titre '' of Louis XV of France and one of the victims of the Reign of Terror during the French Revolution .
Jeanne Bécu , Countess of Barry ( 19 August 1743 -- 8 December 1793 ) was the last mistress of Louis XV of France . She was one of the victims of the Reign of Terror .