Columbia subject headings:
Fontana del Nettuno (Bologna, Italy)--Exhibitions.
Fountains--Italy--Bologna--Exhibitions.
Hydraulic structures--Italy--Bologna--History--Exhibitions.
Sculpture, Italian--Italy--Bologna--16th century--Exhibitions.
Water-supply engineering--Italy--Bologna--History--Exhibitions.
Harvard subject headings:
Bologna (Italy)--Buildings, structures, etc.--Exhibitions.
Fontana del Nettuno (Bologna, Italy)--Exhibitions.
Fountains--Italy--Bologna--Exhibitions.
Hydraulic structures--Italy--Bologna--History--Exhibitions.
Sculpture, Italian--Italy--Bologna--16th century--Exhibitions.
Water-supply engineering--Italy--Bologna--History--Exhibitions.
Princeton subject headings:
Fontana del Nettuno (Bologna, Italy)--Exhibitions.
Fountains--Italy--Bologna--Exhibitions.
Hydraulic structures--Italy--Bologna--History--Exhibitions.
Sculpture, Italian--Italy--Bologna--16th century--Exhibitions.
Water-supply engineering--Italy--Bologna--History--Exhibitions.