Columbia subject headings:
City halls--Italy--Palermo.
Palermo (Italy)--Buildings, structures, etc.
Harvard subject headings:
City halls--Italy--Palermo.
Palazzo delle Aquile (Palermo, Italy)
Palermo (Italy)--Buildings, structures, etc.
Princeton subject headings:
Palazzo delle Aquile (Palermo, Italy)
Palermo (Italy)--Buildings, structures, etc.