Columbia subject headings:
Basilica di San Pietro in Vaticano.
Cemeteries--Italy--Rome.
Excavations (Archaeology)--Vatican City.
Peter, the Apostle, Saint--Tomb.
Tombs--Italy--Rome.
Vatican City--Antiquities, Roman.
Harvard subject headings:
Basilica di San Pietro in Vaticano.
Excavations (Archaeology)--Vatican City.
Mausoleums--Italy--Rome.
Rome (Italy)--Antiquities.
Princeton subject headings: