Columbia subject headings:
Architecture, Baroque--Italy--Piedmont.
Church architecture--Italy--Piedmont.
Harvard subject headings:
Architecture, Baroque--Italy--Piedmont.
Church architecture--Italy--Piedmont.
Church buildings--Italy--Piedmont.
Domes--Italy--Piedmont.
Piedmont (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Baroque--Italy--Piemonte.
Church architecture--Italy--Piemonte.