"caliph" -
key terms from Wikipedia
abbasid
caliph
became
caliph
caliph
caliph
abu
bakr
caliph
ali
caliph
of
islamic
empire
caliph
umar
caliph
uthman
first
caliph
ottoman
caliph
reign
as
caliph
rightly
guided
caliph
third
caliph
title
of
caliph