Which of these cities is the national capital of its country?

Rome is a historic city and capital of the country Italy. It is located in the central portion of the Italian peninsula, on the Tiber River about 15 miles inland from the Tyrrhenian Sea. Once the capital of an ancient republic and empire, Rome is the Eternal City, remaining today a political capital, a religious center, and a memorial to the creative imagination of the past.

Source: Britannica