The Vatican, officially known as the Vatican City State, is an independent city-state enclaved within Rome, Italy. It is the smallest country in the world, covering about 44 hectares (110 acres). The Vatican serves as the spiritual and administrative center of the Roman Catholic Church and is the residence of the Pope, the leader of the Church. The Vatican is home to many significant religious and cultural sites, including St. Peter's Basilica, St. Peter's Square, and the Vatican Museums. These attractions draw millions of visitors each year, showcasing remarkable art and architecture, such as the famous Sistine Chapel ceiling painted by Michelangelo.