Élisabeth Charlotte d'Orléans was a petite-fille de France, and duchess of Lorraine and Bar by marriage to Leopold, Duke of Lorraine. She was regent of Lorraine and Bar during the minority and absence of her son , and suo jure Princess of Commercy 1737–1744. Among her children was Francis I, Holy Roman Emperor, a co-founder of the House of Habsburg-Lorraine.
