Rome (m/ ROHM; Italian: Romai[ˈroːma]; Latin: Roma[ˈroːma]) is the capital city of Italy and a special comune (named Comune di Roma Capitale). Rome also serves as the capital of the Lazioregion. With 2,872,800 residents in 1,285 km2 (496.1 sq mi), it is also the country's most populated comune. It is the fourth-most populous city in the European Union by population within city limits. It is the centre of the Metropolitan City of Rome, which has a population of 4.3 million residents. Rome is located in the central-western portion of the Italian Peninsula, within Lazio (Latium), along the shores of the Tiber. The Vatican City is an independent country inside the city boundaries of Rome, the only existing example of a country within a city: for this reason Rome has been often defined as capital of two states.
According to the founding myth of the city by the Ancient Romans themselves, the long-held tradition of the origin of the name Roma is believed to have come from the city's founder and first king, Romulus.
However, it is a possibility that the name Romulus was actually derived from Rome itself. As early as the 4th century, there have been alternative theories proposed on the origin of the name Roma. Several hypotheses have been advanced focusing on its linguistic roots which however remain uncertain:
from Rumon or Rumen, archaic name of the Tiber, which in turn has the same root as the Greek verb ῥέω (rhéō) and the Latin verb ruo, which both mean "flow";[b]