Ostrog Bible The Ostrog Bible was one of the earliest East Slavic translations of the Bible and the first complete printed edition of the Bible in Old Church Slavonic, published in Ostrog, in the Polish-Lithuanian Commonwealth, by the Muscovy printer Ivan Fyodorov in 1581 with the assistance of the Ukrainian Prince Konstantin Ostrogski. in Research Translations & Translators > About Translationswith 1581slavonicwikipedia