Leo V

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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 iconoclasmiconoclasm
[Gr.,=image breaking], opposition to the religious use of images. Veneration of pictures and statues symbolizing sacred figures, Christian doctrine, and biblical events was an early feature of Christian worship (see iconography; catacombs).
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, he deposed the patriarch NicephorusNicephorus, Saint
, 758?–829?, patriarch of Constantinople (806–15), Byzantine historian and theologian. St. Nicephorus attended the Second Council of Nicaea as lay representative of the emperor.
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 in the synod of 815 and persecuted the orthodox party led by Theodore of StudiumTheodore of Studium, Saint
, 759–826, Byzantine Greek monastic reformer, also called St. Theodore the Studite. As an abbot he was early exiled for opposing the marriage of Emperor Constantine VI to his mistress Theodota.
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. Leo was murdered by the supporters of his successor, Michael II.