the capital of an arrondissement of the same name in the department of Saône et Loire, in France, is picturesquely situated on the declivity of a hill, at the foot of which flows the Arroux. This is one of the most ancient towns of France, and when Caesar invaded Gaul it was by far the greatest and wealthiest town of the Aedui. Its name was then Bibracte, but being afterwards much improved and embellished by Augustus it took that of Augustodunum. Many Roman and other remains still attest its former greatness; among which are large masses of its ancient walls, and two gates in admirable preservation. The cathedral is a structure of the eleventh century, and contains an elegant fountain in its square. Autun is the seat of a bishopric, and has a college, a diocesan seminary, a museum, library, theatre, &c., with tribunals of primary jurisdiction and commerce. It has manufactures of cotton goods, hosiery, leather, and paper, with a considerable trade in timber, hemp, and cattle. Population (1821), 11,094. The arrondissement is divided into 8 cantons and 86 communes. Population in 1851, 100,286.