Columbia subject headings:
Harvard subject headings:
Charlemagne, Emperor, 742-814.
France--Foreign relations--Islamic Empire.
Hārūn al-Rashīd, Caliph, approximately 763-809.
Islamic Empire--Foreign relations--France.
Princeton subject headings:
Charlemagne, Emperor, 742-814.
France--Foreign relations--Islamic Empire.
Hārūn al-Rashīd, Caliph, approximately 763-809.
Islamic Empire--Foreign relations--France.