Answer: The Tiber
Explanation: The Tiber (/ˈtaɪbər/; Latin: Tiberis; Italian: Tevere [ˈteːvere]) is the third-longest river in Italy and the longest in Central Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing 406 km (252 mi) through Tuscany, Umbria, and Lazio, where it is joined by the River Aniene,