Columbia subject headings:
Art--Vatican City.
Christian art and symbolism--Vatican City.
Papacy--History.
Rome (Italy)--History.
Vatican City--History.
Harvard subject headings:
Art--Vatican City--Pictorial works.
Art--Vatican City.
Christian art and symbolism--Vatican City.
Museums--Vatican City--Pictorial works.
Papacy--History
Rome (Italy)--History.
Vatican City--History--Pictorial works.
Vatican City--History.
Princeton subject headings:
Art--Vatican City.
Vatican City--History.
Vatican City--Museums.