Nicolas-Alexandre, marquis de Ségur (1695–1755) was a Bordeaux wine maker who during his lifetime was known as the "Prince of Vines" due to his ownership of some of the most famous Bordeaux chateaus-including Château Lafite, Château Latour, Château Mouton and Château Calon-Ségur.
Nicolas-Alexandre de Ségur, a prominent figure in 18th-century Bordeaux, was celebrated for his exceptional wine-making skills, earning him the nickname "Prince of Vines" as he controlled some of the region's most renowned estates, including Château Lafite and others.