Rome is the capital of Italy with a population of over 4 million people. It has incredible history dating back to its founding in 753 BC by the twins Romulus and Remus, and was the capital of the Roman Kingdom, Republic, and Empire. As the former capital of the Roman Empire, Rome contains many historic monuments built by emperors like the Trevi Fountain and the Colosseum, originally used for gladiator contests, that continue to attract millions of visitors annually.