Vatican City, the sovereign state

The Papal States, the former territorial possessions of the Holy See

The Roman Curia, the administrative apparatus of the Holy See

Vatican Hill, a hill in Rome on the opposite side of the Tiber from the traditional seven hills of Rome

Apostolic Palace, the official residence of the Pope in Vatican City (sometimes referred to as the Vatican Palace)

The Holy See, the governing body of the Roman Catholic Church and the Vatican City, consisting of the Pope and the Roman Curia