(A.D. 815–885) Methodius was a Byzantine Christian theologian and missionary to the Slavic people. He was critical in developing the first Slavic literary language in order to translate the Bible into Slavic. He and his brother, Cyril of Thessalonica(c. A.D. 826–869) Cyril of Thessalonica was a Byzantine Christian theologian and missionary to the Slavic people. He was critical in developing the ... more, found great success among the Slavic people.
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PEOPLE (see A.D. 815–885)