Columbia subject headings:
Catania (Italy)--Antiquities--Congresses.
Excavations (Archaeology)--Italy--Catania--Congresses.
Harvard subject headings:
Catania (Italy)--Antiquities--Congresses.
Excavations (Archaeology)--Italy--Catania--Congresses.
Sicily (Italy)--History--To 800
Princeton subject headings:
Catania (Italy)--Antiquities--Congresses.
Catania (Italy)--Civilization--Congresses.
Catania (Italy)--Commerce--History--Congresses.