Franois Louis de Bourbon was Prince de Conti, succeeding his brother Louis Armand in 1685. Until this date he used the title of Prince of La RochesurYon. He was son of Armand de Bourbon and Anne Marie Martinozzi, herself a niece of Cardinal Mazarin. He is the most famous member of the Conti family, a cadet branch of the Princes of Cond. As a member of the reigning House of Bourbon, he was a prince du sang.
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Source: Wikipedia