Columbia subject headings:
Harvard subject headings:
Acculturation--Germany--Lahnau--Congresses.
Celts--Germany--Lahnau--History--Congresses.
Germanic peoples--Germany--Lahnau--History--Congresses.
Lahnau (Germany)--Antiquities, Celtic--Congresses.
Lahnau (Germany)--Antiquities, Roman--Congresses.
Romans--Germany--Lahnau--History--Congresses.
Princeton subject headings:
Germanic peoples--Congresses.
Germany--History--To 843--Congresses.
Romans--Germany--History--Congresses.