Vatican City, officially Vatican City State is a walled enclave within the city of Rome. With an area of approximately 44 hectares (110 acres), and a population of 842, it is the smallest internationally recognized independent state in the world by both area and population.
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.
Within Vatican City are cultural sites such as St. Peter's Basilica, the Sistine Chapel and the Vatican Museums. They feature some of the world's most famous paintings and sculptures. The unique economy of Vatican City is supported financially by the sale of postage stamps and tourist mementos, fees for admission to museums, and the sale of publications.