Columbia subject headings:
Church buildings--Italy--Rome--Guidebooks.
Rome (Italy)--Buildings, structures, etc.--Guidebooks.
Harvard subject headings:
Catholic church buildings--Italy--Rome--Guidebooks.
Church architecture--Italy--Rome--Guidebooks.
Church buildings--Italy--Rome--Guidebooks.
Rome (Italy)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture--Italy--Rome.
Church architecture--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.