Columbia subject headings:
Augustus, Emperor of Rome, 63 B.C.-14 A.D.--Art--Exhibitions.
Charlemagne, Emperor, 742-814--Art--Exhibitions.
Harvard subject headings:
Augustus, Emperor of Rome, 63 B.C.-14 A.D.--Art--Exhibitions.
Charlemagne, Emperor, 742-814--Art--Exhibitions.
Princeton subject headings:
Art.
Augustus, Emperor of Rome, 63 B.C.-14 A.D.--Art--Exhibitions.
Charlemagne, Emperor, 742-814--Art--Exhibitions.