Columbia subject headings:
Harvard subject headings:
Externsteine (Germany)--Antiquities.
Externsteine (Germany)--Description and travel.
Rocks--Germany--Externsteine.
Sculpture, Prehistoric--Germany--Externsteine.
Princeton subject headings:
Excavations (Archaeology)--Germany--Externsteine.
Externsteine (Germany)
Germany--Antiquities.
Relief (Sculpture), Medieval--Germany--Externsteine.