FIDENTIA, formerly BORGO SAN DONNINO, a town and Episcopal see of Emilia, Italy, province of Parma, 14 m. N.W. by rail from that town. Pop. (1931) town, 10,071; commune, 17,154. It occupies the site of the ancient Fidentia, on the Via Aemilia and resumed its name very recently. Here M. Lucullus defeated the democrats under Carbo in 82 B.C. Independent under Vespasian, it became subject to Parma. Its mediaeval name came from the martyrdom of S. Domninus under Maxituian in A.D. 304. The cathedral of S. Domninus is one of the finest Lombardo-Romanesque churches (1 I th-13th cent.) . Near the town is the small brick church of S. Antonio del Viennese (13th century). The Palazzo Comunale is in Gothic-Lombard style of the i4th century. Fidentia is an agricultural centre.