(the ancient Issiordurum), a town of France, capital of a cognominal arrondissement, in the department of Puy-de-Dôme, on the Couse, near its confluence with the Allier, and 18 miles S.S.E. of Clermont. The only point of public interest in the town is the Church of St Paul, a curious specimen of the Romanesque style. It has a considerable trade in articles of copper manufacture, as also in hemp and wine. Pop. (1851) 3785.