Columbia subject headings:
City halls--Italy--Emilia-Romagna.
Historic buildings--Italy--Emilia-Romagna.
Harvard subject headings:
City halls--Italy--Emilia-Romagna--History.
Emilia-Romagna (Italy)--Buildings, structures, etc.
Princeton subject headings:
City halls--Italy--Emilia-Romagna--History.
Emilia-Romagna (Italy)--Buildings, structures, etc.