Rome is a city and special comune (named "Roma Capitale") in Italy. Rome is the capital of Italy and also of the homonymous province and of the region of Lazio. With 2.8 million residents in 1,285.3 km2 (496.3 sq mi), it is also the country's largest and most populated comune and fifth-most populous city in the European Union by population within city limits. Between 3.2 and 3.8 million people live in the Rome urban and metropolitan area. The city is located in the central-western portion of the Italian Peninsula, on the Tiber within the Lazio region of Italy. Rome is referred to as "The Eternal City", a notion expressed by ancient Roman poets and writers.