a town of France, capital of an arrondissement, in the department of Morbihan, on the lake and river Duc, 25 miles N.E. of Vannes. The town is well built, and has wide, clean streets, two squares, and a public green. The parish church is a low, heavy building, containing interesting monuments of two of the dukes of Brittany. There are also here a college, hospital, and court-house. The inhabitants trade in hempen yarn, iron, cattle, woollen and linen stuffs, &c. The climate is very healthy. Pop. (1856) 4868.