Columbia subject headings:
Architecture--Portugal--History--Exhibitions.
Historic buildings--Conservation and restoration--Portugal--Exhibitions.
Historic buildings--Remodeling for other use--Portugal--Exhibitions.
Harvard subject headings:
Architecture--Portugal--History--Exhibitions.
Historic buildings--Conservation and restoration--Portugal--Exhibitions.
Historic buildings--Remodeling for other use--Portugal--Exhibitions.
Princeton subject headings:
Architecture--Portugal--History--Exhibitions.
Historic buildings--Conservation and restoration--Portugal--Exhibitions.
Historic buildings--Remodeling for other use--Portugal--Exhibitions.