Vatican City

The smallest independent state in the world, an enclave within Rome that serves as the spiritual and administrative center of the Roman Catholic Church. Home to the Pope and a massive collection of art and history, it is a site of profound religious and cultural significance. St. Peter's Basilica and the Sistine Chapel are among the most visited landmarks on earth. Vatican City's influence on global morality, politics, and history for over a millennium makes it a unique geopolitical entity, operating as a sovereign state while managing the faith of over a billion people.

Added by @marcoricci