ボリス1世
King Svatopluk I of Great Moravia expelled the Byzantine missionary contingent in 886. Exiled students of the two apostles, mainly Bulgarians, (including Clement of Ohrid and Saint Naum) then brought the Glagolitic alphabet to the First Bulgarian Empire. Boris I of Bulgaria () received and officially accepted them; he established the two literary schools: the Preslav Literary School and the Ohrid Literary School.