<P> 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 Tuscany , Umbria and Lazio , where it is joined by the river Aniene , to the Tyrrhenian Sea , between Ostia and Fiumicino . 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 . </P>
what river is associated with the city of rome
Tiber