Columbia subject headings:
Harvard subject headings:
Catholic Church. Rota Romana--History.
Chapels--Vatican City--History.
Vatican City--Buildings, structures, etc.
Vatican Palace (Vatican City)--History.
Princeton subject headings:
Catholic Church. Rota Romana--History.
Chapels--Vatican City--History.
Popes--Dwellings--Italy--Rome--History.
Vatican City--Buildings, structures, etc.
Vatican Palace (Vatican City)--History.