Peter the Apostle's grave. There was another cemetery nearby, which was opened to the public on 10 October 2006, to commemorate the 500th anniversary of the Vatican Museums. [1] The Vatican Hill is not one of the famous seven hills of Rome, although it was included within the city limits of Rome during the reign of Pope Leo IV, who, between 848 and 852, expanded the city walls to protect St. Peter's Basilica and the Vatican. Thus, Vatican Hill has been within the walls and city limits of Rome (until the Lateran Treaties in 1929 it was part the rione of Borgo) for over 1100 years.
After the Avignon Papacy the church administration moved to Vatican Hill and the papal palace was (until 1871) the Quirinal Palace, upon the Quirinal Hill. Since 1929, part of the Vatican Hill is the site of the State of the Vatican City. However, the cathedral of the Bishop of Rome, the Pope, is not St. Peter's in the Vatican, but Basilica di San Giovanni in Laterano, which is extra-territorially linked, as indicated in the Lateran Pacts signed with the Italian state in 1929, with the Holy See.
Source: Wikipedia > Vatican Hill
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