St. Peter's Basilica is a magnificent church located in Vatican City, Rome. Designed by renowned architects such as Michelangelo, Bramante, and Bernini, it is one of the largest and most important churches in the world. The basilica is renowned for its stunning Renaissance architecture, including Michelangelo's famous dome, and is considered a major pilgrimage site for Catholics. It houses numerous works of art, including the Pietà by Michelangelo, and is the spiritual center of the Catholic Church.