Hidden Beneath the Centuries
The Vatican Necropolis lies at a depth of three to eleven meters below the central nave of St. Peter's Basilica. Here, visitors can rediscover the most significant historical and archaeological evidence of the early Church—and walk the ancient earthen road that once led to Saint Peter's tomb.
The discovery dates to the early years of Pope Pius XII's pontificate (1939-1958), when he authorized archaeological explorations in the area of the Vatican Confessio. What emerged stunned the world: brick buildings from the second century, originally used as elaborate family tombs, had been intentionally buried in the fourth century to serve as foundations for the first Petrine Basilica.
Constantine's Grand Undertaking
The necropolis was still in active use when Emperor Constantine ordered it covered. His determination to build the largest basilica in the western world exactly over Peter's tomb required an engineering feat of staggering proportions.
Over 40,000 cubic meters of earth were moved to level Vatican Hill's double slope—which ascended from east to west while also falling steeply from north to south toward the circus valley. The tops of the tomb buildings that exceeded the planned floor level were demolished, while their lower portions remained intact beneath the new church.
Paradoxically, the very act of building the basilica—which ended the Roman necropolis—also ensured its preservation for sixteen centuries.
A City of the Dead
The 22 unearthed tomb buildings were designed to accommodate approximately 1,000 burials—both cremation urns and full inhumations. Men, women, and especially children of imperial freedmen families found their final rest here, their names preserved on inscriptions that have survived nearly two millennia.
Remarkably, the necropolis contains both pagan and Christian burials, offering a unique glimpse into the religious transition of ancient Rome. Some tombs feature traditional Roman imagery, while others bear early Christian symbols—evidence of a community in transformation.