town, capital of Morbihan département, Bretagne région, western France. It is situated at the confluence of two streams forming the Vanne River, which opens into the virtually landlocked Gulf of Morbihan about 1 mile (1.5 km) below the town. A market centre, it has spread around the old walled town situated on a hill. The 13th–17th-century ramparts, linked by towers and gates, are well preserved on the east side of the old town above the Rohan stream. The Place Henri IV is bordered by 16th-century gabled houses. The cathedral of Saint-Pierre, burned by the Normans in the 10th century, was rebuilt between the 13th and 19th centuries.

Vannes was the centre of the Veneti tribe who led the unsuccessful Armorican rising against Julius Caesar after the Roman conquest. The Celtic ecclesiastic St. Paternus was consecrated first bishop of Vannes in 466. After a period of rule by independent counts, Vannes came under the yoke of the Franks. In 845 Nominoë, the Breton leader in Armorica, defeated the Frankish king Charles the Bald and established the independent duchy (for a time kingdom) of Brittany. Vannes became part of the duchy in 990. The Estates of Brittany, meeting in Vannes in 1532, ratified the union of the duchy with the French crown. The town is an important agricultural centre, with poultry farming and the production of poultry and cattle foodstuffs. Light industries include the manufacture of tires, prefabricated building material, and metalworking. Vannes's magnificent flower gardens are a tourist attraction. Pop. (2004 est.) 53,900.