Columbia subject headings:
Church architecture--Italy--Rome.
Church buildings--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Harvard subject headings:
Church architecture--Early works to 1800.
Church buildings--Italy--Rome--Guidebooks.
Church buildings--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.--Guidebooks.
Rome (Italy)--Pictorial works
Princeton subject headings: