<Tr> <Th_colspan="2"> Basin features </Th> </Tr> <Tr> <Th> Basin size </Th> <Td> 17,375 km (6,709 sq mi) </Td> </Tr> <P> The Tiber (/ ˈtaɪbər /, Latin: Tiberis, Italian: Tevere (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> <P> The river rises at Mount Fumaiolo in central Italy and flows in a generally southerly direction past Perugia and Rome to meet the sea at Ostia . Popularly called flavus ("the blond"), in reference to the yellowish colour of its water, the Tiber has heavily advanced at the mouth by about 3 kilometres (2 miles) since Roman times, leaving the ancient port of Ostia Antica 6 kilometres (4 miles) inland . However, it does not form a proportional delta, owing to a strong north - flowing sea current close to the shore, to the steep shelving of the coast, and to slow tectonic subsidence . </P>

Where is the tiber river located in italy