Columbia subject headings:
Harvard subject headings:
Charlemagne, Emperor, 742-814--Art--Congresses.
Charlemagne, Emperor, 742-814--In literature--Congresses.
Charlemagne, Emperor, 742-814--Influence--Congresses.
Kings and rulers in art--Congresses.
Kings and rulers in literature--Congresses.
Princeton subject headings:
Charlemagne, Emperor, 742-814--Art--Congresses.
Charlemagne, Emperor, 742-814--In literature--Congresses.
Charlemagne, Emperor, 742-814--Influence--Congresses.
Kings and rulers in art--Congresses.
Kings and rulers in literature--Congresses.