Columbia subject headings:
Architectural design--Italy--Palermo--History--19th century--Exhibitions.
Architectural design--Italy--Palermo--History--20th century--Exhibitions.
Harvard subject headings:
Architectural design--Italy--Palermo--History--19th century--Exhibitions.
Architectural design--Italy--Palermo--History--20th century--Exhibitions.
Architecture--Italy--Palermo--History--19th century.
Princeton subject headings:
Architectural design--Italy--Palermo--History--19th century--Exhibitions.
Architectural design--Italy--Palermo--History--20th century--Exhibitions.