The civilization of ancient Rome originated in the 8th or 9th century BC, when the tribe of the Latini migrated to the Italian peninsula to settle around the River Tiber. For almost a thousand years, Rome was a very important city in the Western world and possibly the largest city in the world, with around 1.5 to 2 million inhabitants, as the capital of the expansive Roman Empire. With the rise of Christianity, Rome became the center of the Roman Catholic Church and the home of the popes. The slow decline of the Roman Empire heralded the beginning of the Middle Ages, but the city regained prominence as the cultural capital of Western Roman Empire for several hundred years leading up to the Renaissance. Rome remains influential today, as the capital of Italy, as center of the Catholic Church, and as a major metropolis.

In Roman mythology, Rome was built on April 21, 753 BC by the twin descendants of the Trojan prince Aeneas, Romulus and Remus. Romulus killed Remus in a quarrel over where their city was to be located and became the first of seven Kings of Rome, as well as the source of the city's name.

Rome is located on the Tiber River 15 miles (24 km) inland from the Tyrrhenian Sea. The city was built on a defendeble hill dominating the last high-banked river crossing where traverse was faciliated by a midstream isle.

Much of Rome is located within the old city walls. The Servian Wall was built 12 years after Gauls' conquest of the city in 390 BC. The wall enclosed most of the Esquiline and Caelian Hill and contained the entire area of the other five. Rome grew beyond the Servian Wall but no more walls were constructed until AD 270 when Aurelian began building in brick-faced concrete. The wall is almost 12 miles long and was the wall Italian forces had to breach in 1870. The wall is still largely intact.

The ancient city within the walls covers about 4 percent of the modern municipality's 582 square miles. The old city is the smallest of Rome's 12 administrative zones. The walled city center is made up of 22 rioni (districts), sorrounding it are 35 quartieri urbani (urban sectors), and within the city limits are six large suburbi (suburbs). The comune of Rome located outside the municipal boundaries about doubles the area of the actual city.

A belt highway describes a huge circle around the capital about six miles out from the city center. The circle ties together the antique roads that led to Rome: the Via Flaminia, the Via Aurelia and Via Appia. Large amounts of modern apartment buildings are located in the districts outside the center, where contemporary architecture has not gone unnoticed. Many street frontages and show windows often change to keep up with the times and the Romans have suceeded in harmonizing the old and the new.

Though small, the old city center contains about 300 hotels and 300 pensioni, over 200 palaces, 20 churches, eight of Rome's major parks, the residence of the Italian president, the houses of the Parliament, offices of the city and city government, and many great and well-known monuments. The old city also contains thousands of workshops, offices, bars, and restaurants. Millions of tourists annually flock to this area.

Rome (Italian and Latin: Roma) is the capital of Italy and of its region, called Latium. It is located across the confluence of the Tiber and Aniene rivers. It was once the capital of the Roman Empire, the most powerful, largest and longest lasting empire of classical Western civilization. The Vatican, a sovereign enclave within Rome, is the seat of the Roman Catholic Church and the home of the Pope.

Rome is the largest comune in Italy and it is also one of the largest European capital cities in land area, with an area of 1,285 square kilometers. The comune territory extends up to the Tyrrhenian Sea, with the district of Ostia, on the south-west, located on the shore. Within the city limits, the population is about 2.5 million; almost 3.8 million live in the general area of Rome, as represented by the province of Rome, making it second in population to Milan. The current mayor of Rome is Walter Veltroni.

With a gross domestic product of €97 billion in the year 2005, the comune of Rome produced 6.7% of Italy's GDP, which is the highest proportion of GDP produced by any single one of Italy's comunes.

The city's history extends nearly 2,800 years, during which time it has been the seat of ancient Rome and, later, the Papal States, Kingdom of Italy and Italian Republic (modern Italy). Rome is also called "la Città Eterna" (the Eternal City), "l'Urbe" (the latin for the City pre-eminently) and "The City of the Seven Hills".

Central Rome is dominated by the traditional seven hills that hark back to the Latin founding myth of the city. These seven hills are the Quirinal, Viminal, Esquiline, Caelian, Aventine, Capitoline, and Palatine Hills. The Tiber River and its islands are an important additional component of the city, flowing south through the western portion of the central zone.