Columbia subject headings:
Harvard subject headings:
Caliphate
Caliphs.
Islam and state.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661
Princeton subject headings:
Caliphate.
Caliphs.
Islam and state.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661.