In 1272, Robert, Count of Clermont, sixth and youngest son of King Louis IX of France, married Beatrix of Bourbon, heiress to the lordship of Bourbon and member of the House of Bourbon-Dampierre. Their son Louis was made Duke of Bourbon in 1327. His descendant, the Constable of France Charles de Bourbon, was the last of the senior Bourbon line when he died in 1527. Because he chose to fight under the banner of Holy Roman Emperor Charles V and lived in exile from France, his title was discontinued after his death.