Columbia subject headings:
Art--Italy--Castel Gandolfo.
Interior decoration--Italy--Castel Gandolfo--History--18th century.
Palazzo apostolico (Castel Gandolfo, Italy)
Harvard subject headings:
Art--Italy--Castel Gandolfo.
Interior decoration--Italy--Castel Gandolfo--History--18th century.
Palazzo apostolico (Castel Gandolfo, Italy)
Princeton subject headings:
Art--Italy--Castel Gandolfo.
Interior decoration--Italy--Castel Gandolfo--History--18th century.
Palazzo apostolico (Castel Gandolfo, Italy)