St. Peter's Basilica

St. Peter's Basilica rises over the traditional burial place of the Apostle Peter, who was martyred in Rome around AD 64 during Nero's persecution. The original basilica, commissioned by Emperor Constantine around AD 324 after the Edict of Milan, stood for more than a thousand years as the mother church of Christendom. By the 15th century it was in disrepair, and in 1506 Pope Julius II laid the cornerstone for the new basilica that stands today.

Its construction, spanning 120 years, drew on the genius of Donato Bramante, Michelangelo, Raphael, Giacomo della Porta, and Carlo Maderno — with Bernini designing the colonnades, baldachin, and Chair of St. Peter in the 17th century. Michelangelo's dome, completed after his death, remains the largest masonry dome ever constructed. The basilica was consecrated in 1626 on the 1,300th anniversary of the original church.

Excavations beneath the basilica between 1939 and 1968 confirmed the existence of a first-century tomb directly below the main altar, with bones that Pope Paul VI announced in 1968 as those of the Apostle Peter.

St. Peter's is the spiritual and administrative center of the worldwide Catholic Church, drawing more than 7 million pilgrims and visitors annually. Papal Masses on Christmas, Easter, and canonizations gather hundreds of thousands in St. Peter's Square. Every new pope is announced from the central balcony, and every major papal event unfolds in this space — making the basilica the universal touchstone of Catholic communion.