Columbia subject headings:
Architecture, Carolingian--Germany.
Charlemagne, Emperor, 742-814--Palaces--Germany.
Excavations (Archaeology)--Germany.
Germany--Antiquities.
Harvard subject headings:
Architecture and archaeology--Germany--History.
Charlemagne, Emperor, 742-814--Palaces--Germany.
Excavations (Archaeology)--Germany
Germany--Antiquities.
Palaces--Germany--History--To 1500.
Princeton subject headings:
Architecture, Carolingian--Germany.
Charlemagne, Emperor, 742-814--Palaces--Germany.
Excavations (Archaeology)--Germany.
Germany--Antiquities.