Columbia subject headings:
Buildings--Vatican City.
Excavations (Archaeology)--Vatican City.
Vatican City--Antiquities.
Vatican City--Buildings, structures, etc.
Vatican City--Historical geography.
Harvard subject headings:
Buildings--Vatican City
Excavations (Archaeology)--Vatican City.
Rome (Italy)--Antiquities, Roman.
Rome (Italy)--Historical geography.
Vatican City--Antiquities, Roman.
Vatican City--Historical geography.
Princeton subject headings:
Buildings--Vatican City.
Excavations (Archaeology)--Vatican City.
Vatican City--Antiquities.
Vatican City--Buildings, structures, etc.
Vatican City--Historical geography.