Judenburg (yōˈdənbŏrkh) [key], city (1991 pop. 9,684), Styria prov., S central Austria, on the Mur River. It is an industrial city and winter sports center. Originally a settlement along a Roman road, Judenburg was settled by Jewish merchants in the 11th cent. and became an important regional commercial center. It has a Romanesque church and a 15th-century bell tower.