COMMERCY, a town of north-eastern France, capital of an arrondissement in the department of Meuse, on the left bank of the Meuse, 26 m. E. of Bar-le-Duc. Pop. (1931) 5,861. It dates from the 9th century, when its lords were dependent on the bishop of Metz. In 1S44 it was besieged by Charles V. For some time the lordship was in the hands of Francois Paul de Gondi, cardinal de Retz, who lived in the town for a number of years, and there composed his memoirs. From him it was pur chased by Charles IV., duke of Lorraine. In 1744 the castle became the residence of Stanislas, king of Poland, as whose guest Voltaire visited the town in 1747. The château is now used as cavalry barracks. The industries include iron-working and the manufacture of boots and hosiery.