 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.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.Following the discovery of bones that had been transferred from a second tomb under the monument, on June 26, 1968, Pope Paul VI said that the relics of Saint Peter had been identified in a manner considered convincing.