Columbia subject headings:
Excavations (Archaeology)--Turkey--İznik.
Romans--Turkey--İznik.
İznik (Turkey)--Antiquities, Roman.
İznik (Turkey)--History.
Harvard subject headings:
Excavations (Archaeology)--Turkey--İznik.
Nicaea (Turkey)--History.
Romans--Turkey--İznik.
Rome--History--Empire, 30 B.C.-284 A.D.
Princeton subject headings:
Nicaea, Empire of--History.
Rome--History--Empire, 30 B.C.-284 A.D.