Terni is an ancient town of Italy, capital of Terni province in southern Umbria, in the plain of the Nera river. It is 104 km (65 mi) N of Rome, 36 km (23 mi) NW of Rieti, and 29 km (18 mi) S of Spoleto. The city lies on the rail line from Rome to Ancona, and is the point of departure for the branch line to Rieti and L'Aquila. It is the seat of a university, and is one of the most important industrial towns of Umbria.