Nikephoros I, Byzantine emperor
Nikephoros I or Nicephorus I (Greek: Νικηφόρος; 750 – 26 July 811) was Byzantine emperor from 802 to 811. Having served Empress Irene as genikos logothetēs, he subsequently ousted her from power and took the throne himself. In reference to his career before becoming Emperor, he is sometimes surnamed "the Logothete" (ὁ Λογοθέτης) and "Genikos" or "Genicus" (ὁ Γενικός). Nikephoros pursued wars against the Arabs and Bulgarians, with mixed results; while invading Bulgaria he was defeated and killed at the Battle of Pliska.