Columbia subject headings:
Harvard subject headings:
Archaeology, Medieval--Germany--Ravensburg.
Burg Ravensburg (Ravensburg, Germany)
Castles--Germany--Ravensburg.
Excavations (Archaeology)--Germany--Ravensburg.
Ravensburg (Germany)--Antiquities.
Princeton subject headings:
Archaeology, Medieval.
Castles--Germany--Ravensburg.
Excavations (Archaeology)--Germany--Ravensburg.
Ravensburg (Germany)--Antiquities.