Duke of Fronsac

Dukedom of Fronsac
Arms of the Vignerot du Plessis family
Creation date1634 (second creation)
First holderArmand Jean du Plessis de Richelieu
Last holderArmand Emmanuel de Vignerot du Plessis
Extinction date1822

Duke of Fronsac (French: duc de Fronsac) was a title of French nobility, first created by promoting the seigneurie of Fronsac to a duchy in 1608, but the title became extinct a few decades later. This title was revived in 1634 for Armand Jean du Plessis de Richelieu, better known as Cardinal Richelieu, and it survived until the 19th century.