The Duke of Longueville is a title in the French nobility, historically associated with the region of Normandy. The title was first created in the 15th century and has been held by various noble families over the years. The dukedom is known for its significant influence during the French Renaissance and its connections to the royal court. The most notable holder of the title was Henri de Longueville, who played a prominent role in the Fronde, a series of civil wars in France during the 17th century. The title has since become less prominent, but it remains a symbol of the rich history of French aristocracy and its impact on the country's political landscape.