Columbia subject headings:
Harvard subject headings:
Catholic Church--Italy--Rome--History.
Church and state--Italy--Rome--History.
Rome (Italy)--Church history.
Princeton subject headings:
Castelli Romani (Italy)--Church history.
Catholic Church--Italy--Castelli Romani--History.
Catholic Church--Italy--Castelli Romani--Political activity.
Catholic Church. Diocese of Frascati (Italy)--History.