“Peter’s tomb is not in the Vatican”
http://vaticaninsider.lastampa.it/en/homepage/inquiries-and-interviews/detail/articolo/san-pietro-saint-peter-san-pedro-15251/

This is according to one of the visions experienced by mystic Maria Valtorta and recorded in the latest book by Catholic writer and journalist, Antonio Socci

GIACOMO GALEAZZI
VATICAN CITY

St. Peter is not where we think he is. During the Second World War, the mystic, Maria Valtorta, recounted what Jesus had allowed her to “see”: Peter was never buried on the Vatican Hill, the place of his martyrdom. His remains were actually buried and looked after by Christians in what are known today as the catacombs of Ss. Marcellinus and Peter in Via Casilina in Rome. The mystic also warned Pius XII of the “black legend” that was to strike down upon him for having kept silent about the h0Ɩ0cαųst. “In a dictate dated December 1943, Jesus urges Pius XII to publicly denounce the nαzι antichrist and the Jєωιѕн genocide, accepting his consequent martyrdom. In order to avoid being accused of connivance in the future. Which is precisely what happened.”...