The Colosseum, originally known as the Flavian Amphitheater (in Latin Amphitheatrum Flavium) or simply Amphitheatrum (in Italian: Anfiteatro), is the largest Roman amphitheater in the world (capable of holding an estimated number of spectators between 50,000 and 87,000), located in the center of the city of Rome. It is the most important Roman amphitheater, as well as the most impressive monument of ancient Rome that has come down to us.
The Capitoline Hill, also known as Monte Capitolino (Mons Capitolinus), is the smallest of the hills on which Rome was founded. On the hill stands the Palazzo Senatorio, seat of the city's town hall built in 1144. The English term capitol (palace which houses the administration of a government), as well as the term capital (intended as capital city), derive from the Capitoline Hill.
The Vatican City, officially the Vatican City State (in Latin: Status Civitatis Vaticanæ[), also simply called the Vatican (or by definition San Pietro, or improperly the Holy See), is a landlocked city-state on the Italian peninsula, the smallest sovereign state in the world both in terms of population (764 inhabitants) and territorial extension (0.44 km²), the third in terms of population density. As a form of government it is an elective absolute monarchy.