What is the name of river on which city rome was built?

The city of Rome was built on the Tiber River. The Tiber River is a river in central Italy that flows for 406 kilometers (252 miles) from the Apennine Mountains to the Tyrrhenian Sea. The river has played an important role in the history of Rome, as it provided a source of water, transportation, and trade. The Tiber River also served as a natural defense for the city, as its steep banks made it difficult for enemies to attack from the north.