Note 110 The office of vizier was superseded by the emir al Omra, Imperator Imperatorum, a title first instituted by Radhi, and which merged at length in the Bowides and Seljukides: vectigalibus, et tributis, et curiis per omnes regiones praefecit, jussitque in omnibus suggestis nominis ejus in concionibus mentionem fieri, (Abulpharagius, Dynart. p 199.) It is likewise mentioned by Elmacin, (p. 254, 255.)]

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The History Of The Decline And Fall Of The Roman Empire —Fall In The East —Chapter 52