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 city-state enclaved within Rome, the only existing example of a state 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.
Overthrow of the Roman monarchy (509 BC) – expulsion of the last king of Rome, Lucius Tarquinius Superbus, and the establishment of the Roman Republic.
Arab raid against Rome (846) – Saracen raiders plundered the outskirts of the city of Rome, sacking the basilicas of Old St Peter's and St Paul's-Outside-the-Walls, but were prevented from entering the city itself by the Aurelian Wall.
Sack of Rome (1527) – Rome is sacked by the mutinous troops of Charles V, Holy Roman Emperor, marking the end of the Roman Renaissance.
Annexation of Rome by France – the French invaded, under the rule of Napoleon Bonaparte, establishing the Department of Rome. Rome became a canton within the Arrondissement of Rome.
Siege of Rome (1849) – Rome is besieged by French Second Republic forces Rome during the short-lived Roman Republic
Capture of Rome – Rome was captured by Italian forces in September 1870, ending the Risorgimento, and establishing Rome as the capital of the Kingdom of Italy. It marked both the final defeat of the Papal States under Pope Pius IX and the unification of the Italian peninsula under King Victor Emmanuel II of the House of Savoy.
Lateran Treaty – treaty signed between Italy and the Catholic Church in 1929. It settled the Roman Question, established the Holy See as a sovereign entity, and recognized Vatican City as an independent state and the sovereign territory of the Holy See, within Rome.
Holy See – headquartered in its sovereign territory, Vatican City.
Vatican City (outline) – established in 1929 in the Lateran Treaty as the sovereign territory of the Holy See. It becomes an enclave, within Rome.
EUR, Rome (Esposizione Universale Roma) – Construction of the EUR began in 1936 in anticipation for Mussolini's World Fair in 1942 to mark the 20th anniversary of the Italian fascist era