Columbia subject headings:
Harvard subject headings:
Canals--Germany--Design and construction--History--To 1500--Exhibitions.
Canals--Germany--Ludwig-Donau-Main Canal--Design and construction--History--Exhibitions.
Carolina Canal (Germany)--Exhibitions.
Castles--Design and contruction--History--To 1500--Exhibitions.
Charlemagne, Emperor, 742-814--Exhibitions.
Excavations (Archaeology)--Germany--Exhibitions.
Germany--Antiquities--Exhibitions.
Germany--History--To 843--Exhibitions.
Inland water transportation--Germany--History--To 1500--Exhibitions.
Ludwig-Donau-Main Canal (Germany)--History--Exhibitions.
Rhein-Main-Donau-Kanal (Germany)--History--Exhibitions.
Princeton subject headings:
Canals--Germany--Design and construction--History--To 1500--Exhibitions.
Carolina Canal (Germany)--Exhibitions.
Charlemagne, Emperor, 742-814--Exhibitions.
Excavations (Archaeology)--Germany--Exhibitions.
Germany--Antiquities--Exhibitions.
Germany--History--To 843--Exhibitions.
Inland water transportation--Germany--History--To 1500--Exhibitions.