Saint Peter's tomb is a site under St. Peter's Basilica that includes several graves and a structure said by Vatican authorities to have been built to memorialize the location of St. Peter's grave. St. Peter's tomb is near the west end of a complex of mausoleums that date between about AD 130 and AD 300.[2] The complex was partially torn down and filled with earth to provide a foundation for the building of the first St. Peter's Basilica during the reign of Constantine I in about AD 330.[3] Though many bones have been found at the site of the 2nd-century shrine, as the result of two campaigns of archaeological excavation, Pope Pius XII stated in December 1950 that none could be confirmed to be Saint Peter's with absolute certainty.[4] However, following the discovery of further bones and an inscription, on June 26, 1968 Pope Paul VI announced that the relics of St. Peter had been identified.