Columbia subject headings:
Christian art and symbolism--Italy--Rome--Guidebooks.
Christian art and symbolism--Vatican City--Guidebooks.
Harvard subject headings:
Art--Italy--Rome--Guidebooks.
Art--Vatican City--Guidebooks.
Christian art and symbolism--Italy--Rome--Guidebooks.
Christian art and symbolism--Vatican City--Guidebooks.
Rome (Italy)--Guidebooks.
Rome--Buildings, structures, etc.--Guidebooks.
Vatican City--Buildings, structures, etc.--Guidebooks.
Vatican City--Guidebooks.
Princeton subject headings:
Art--Italy--Rome--Guidebooks.
Art--Vatican City--Guidebooks.
Christian art and symbolism--Italy--Rome--Guidebooks.
Christian art and symbolism--Vatican City--Guidebooks.
Guidebooks.
Rome (Italy)--Guidebooks.
Vatican City--Guidebooks.