Columbia subject headings:
Harvard subject headings:
Crosses--Conservation and restoration--Italy--Exhibitions.
Mural painting and decoration--Conservation and restoration--Italy--Exhibitions.
Princeton subject headings:
Crosses--Italy--Palermo--Conservation and restoration--Exhibitions.
Galleria regionale della Sicilia.
Mural painting and decoration, Italian--Italy--Palermo--Conservation and restoration--Exhibitions.
Mural painting and decoration, Medieval--Italy--Palermo--Exhibitions.