Columbia subject headings:
Architecture, Greek--Greece--Megalopolis (Extinct city)
Megalopolis (Extinct city)--Antiquities.
Harvard subject headings:
Architecture, Greek--Greece--Megalopolis (Extinct city)
Excavations (Archaeology)--Greece--Megalopolis (Extinct city)
Megalopolis (Extinct city)--Buildings, structures, etc.
Megalopolis (Extinct city)--History.
Princeton subject headings:
Architecture, Greek--Greece--Megalopolis (Extinct city).
Megalopolis (Extinct city)--Antiquities.