What are 3 major modern cities that are located at mouths of rivers in rome?

Three major modern cities located at the mouths of rivers in Rome are Rome itself, which is situated at the mouth of the Tiber River; Ostia, the ancient port city that lies at the river's mouth; and Fiumicino, which is near the mouth of the Tiber and hosts Rome's main international airport. These cities have historically been significant for trade and transportation due to their strategic locations.