Columbia subject headings:
Archaeology, Medieval--Germany--Congresses.
Christian antiquities--Germany--Congresses.
Church architecture--Germany--History--Congresses.
Excavations (Archaeology)--Germany--Congresses.
Germany--Antiquities, Roman--Congresses.
Harvard subject headings:
Christian antiquities--Congresses.
Christian antiquities--Europe--Congresses.
Europe--Church history--Congresses.
Excavations (Archaeology)--Congresses
Princeton subject headings:
Archaeology, Medieval--Germany--Congresses.
Christian antiquities--Germany--Congresses.
Church architecture--Germany--History--Congresses.
Excavations (Archaeology)--Germany--Congresses.
Germany--Antiquities, Roman--Congresses.