Columbia subject headings:
Outdoor sculpture--Italy--Palermo.
Public sculpture--Italy--Palermo.
Sculpture, Italian--Italy--Palermo.
Harvard subject headings:
Monuments--Italy--Palermo.
Palermo (Italy)--Buildings, structures, etc.
Public sculpture--Italy--Palermo.
Princeton subject headings:
Outdoor sculpture--Italy--Palermo.
Public sculpture--Italy--Palermo.
Sculpture, Italian--Italy--Palermo.