Columbia subject headings:
Architecture--Italy--Papal States--History--17th century.
Architecture--Italy--Papal States--History--18th century.
Architecture--Italy--Papal States--History--19th century.
Architecture--Italy--Rome--History--17th century.
Architecture--Italy--Rome--History--18th century.
Architecture--Italy--Rome--History--19th century.
Harvard subject headings:
Princeton subject headings:
Architecture--Italy--Papal States--17th century.
Architecture--Italy--Papal States--18th century.
Architecture--Italy--Papal States--19th century.
Architecture--Italy--Papal States--History--18th century.
Architecture--Italy--Papal States--History--19th century.
Architecture--Italy--Rome--17th century.
Architecture--Italy--Rome--18th century.
Architecture--Italy--Rome--19th century.
Architecture--Italy--Rome--History--18th century.
Architecture--Italy--Rome--History--19th century.