Andronikos I Komnenos (Greek: Ἀνδρόνικος Κομνηνός, romanized: Andrónikos Komnēnós; c. 1118/1120 – 12 September 1185), Latinized as Andronicus I Comnenus, was Byzantine emperor from 1183 to 1185. A nephew of John II Komnenos (r. 1118–1143), Andronikos rose to fame in the reign of his cousin Manuel I Komnenos (r. 1143–1180), during which his life was marked by political failures, adventures, scandalous romances, and rivalry with the emperor.
After Manuel's death in 1180, the elderly Andronikos rose to prominence as the accession of the young Alexios II Komnenos led to power struggles in Constantinople. In 1182, Andronikos seized power in the capital, ostensibly as a guardian of the young emperor. Andronikos swiftly and ruthlessly eliminated his political rivals, including Alexios II's mother and regent, Maria of Antioch. In September 1183, Andronikos was crowned as co-emperor and had Alexios murdered, assuming power in his own name. Andronikos staunchly opposed the powerful Byzantine aristocracy and enacted brutal measures to curb their influence.
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