Leo V

Leo V (Leo the Armenian), d. 820, Byzantine emperor (813–20), successor of Michael I. A former general, Leo successfully defended (813) Constantinople against the Bulgars and concluded a 30-year truce with them. Reviving iconoclasm , he deposed the patriarch Nicephorus in the synod of 815 and persecuted the orthodox party led by Theodore of Studium . Leo was murdered by the supporters of his successor, Michael II.

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