Vatican City, officially Vatican City State or State of Vatican City, is an independent state located within the city of Rome. With an area of 44 hectares, and a population of about 1,000, it is the smallest state in the world by both area and population. However, formally it is not sovereign, with sovereignty being held by the Holy See.
It is an ecclesiastical or sacerdotal-monarchical state ruled by the Bishop of Rome – the Pope. The highest state functionaries are all Catholic clergy of various national origins. Since the return of the popes from Avignon in 1377, they have generally resided at the Apostolic Palace within what is now Vatican City, although at times residing instead in the Quirinal Palace in Rome or elsewhere.
Wikipedia https://en.wikipedia.org/wiki/Vatican_City
Address 7 Viale dei Bastioni di Michelangelo, Roma 00192, Italy
Coordinates 41°54'22.822" N 12°27'22.602" E