Cyprian, Metropolitan of Kiev

Cyprian (Bulgarian: Киприан, Russian: Киприан, Belarusian: Кіпрыян, Ukrainian: Кипріан) (c. 1336 – 16 September 1406) was a prelate of Bulgarian origin, who served as the Metropolitan of Kiev, Rus' and Lithuania (2 December 1375–12 February 1376) and the Metropolitan of Kiev and All Rus' (12 February 1376–16 September 1406) in the Ecumenical Patriarchate of Constantinople. During both periods, he was opposed by rival hierarchs and by the Grand Prince of Moscow. He was known as a bright opinion writer, editor, translator, and book copyist. He is commemorated by the Russian Orthodox Church on May 27 and September 16 (by the Old style).