The building that served as the primary residence of the popes for centuries in Vatican City is the Apostolic Palace. This historic residence is not only the official palace of the Pope but also houses the Vatican Museums, the Vatican Library, and the Sistine Chapel, known for Michelangelo's stunning frescoes. The Apostolic Palace has been the center of papal authority and administration, reflecting the architectural splendor and spiritual significance of the Catholic Church. Over the years, it has hosted numerous important events, including papal audiences, conclaves, and diplomatic meetings, symbolizing the Vatican's influential role in global religious and political matters.