Chernorizets Hrabar (Old Church Slavonic: Чрьнори́зьць Хра́бръ, Črĭnorizĭcĭ Hrabrŭ) was a Bulgarian monk, scholar and writer who worked at the Preslav Literary School at the end of the 9th and the beginning of the 10th century, developing Medieval Bulgarian literature and spreading Old Church Slavonic.
Read more about Chernorizets Hrabar: Name, Literary Work, Excerpt From An Account of Letters