Columbia subject headings:
Harvard subject headings:
Cities and towns, Ancient--Greece--Congresses.
Nikopolis (Greece : Extinct city)
Nikópolis (Greece)--Antiquities, Roman--Congresses.
Nikópolis (Greece)--Antiquities--Congresses.
Nikópolis (Greece)--History--Congresses.
Princeton subject headings:
Cities and towns, Ancient--Greece--Congresses.
Nikopolis (Greece : Extinct city)
Nikópolis (Greece)--Antiquities, Roman--Congresses.
Nikópolis (Greece)--Antiquities--Congresses.
Nikópolis (Greece)--History--Congresses.