Charlotte Aglaé d'Orléans and Francesco III d'Este, Duke of Modena
Charlotte Aglaé d'Orléans and Francesco III d'Este, Duke of Modena were married for 38 years. They dated for 30 days after getting together in 1720. After a 11 days engagement they married on 11th Feb 1720. 38 years later they separated in 1759.