The following outline is provided as an overview of and topical guide to Rome:
Rome – capital of Italy and a special comune (named Comune di Roma Capitale). Rome also serves as the capital of the Lazio region. With 2,876,076 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 center 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 the capital of two states. Rome is a very old city, founded over 28 centuries ago, and it was the center of power of the ancient Roman civilization.