The Tiber (/ˈtaɪbər/, Latin Tiberis, Italian Tevere, Italian pronunciation: [ˈteːvere]) is the third-longest river in Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing 406 kilometres (252 mi) through Umbria and Lazio, where it is joined by the Aniene river, to the Tyrrhenian Sea. It drains a basin estimated at 17,375 square kilometres (6,709 sq mi). The river has achieved lasting fame as the main watercourse of the city of Rome, founded on its eastern banks.