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The prince Rostislav appeal to the Byzantine emperor Michael III for sending teachers into Moravia to spread the Christianity and the Slavic literacy. Michael III sent to Moravia the Salonika teachers, the brothers St. Cyril (Constantine) and St. Methodius, 862/863 (Vast Hagiography of St. Methodius in Uspenski’s Miscellany, 12th - 13th century) |
