Christianization of Moravia

What modern historians designate as Great Moravia was a Slavic state that existed in Central Europe from around 830 to the early 10th century.

The territory of Great Moravia was originally evangelized by missionaries coming from the Frankish Empire or Byzantine enclaves in Italy and Dalmatia since the early 8th century and sporadically earlier.

[8] Cyril translated the liturgy and the pericopes into the Slavic language (their translation became the foundation of the Old Church Slavonic language), giving rise to the popular Slavic church, quickly surpassing the previously struggling Roman Catholic missions with their foreign German priests and Latin liturgy.

[3] After the death of Rastislav successor, Svatopluk I (who expelled the disciples of Methodius from Moravia in 886 thus effectively ending the existence of Slavonic liturgy in his realm) Moravia was partitioned between its neighbours (Bohemia and Hungary) and the Slavic church went into decline, replaced by the churches better established in those other territories.

[10] Nevertheless, a number of expelled Slavic church clerics and scholars found refuge in Bulgaria, where their teachings, liturgical and literacy traditions were successfully incorporated into the early Bulgarian Orthodox Church and formed in great extent the medieval Bulgarian culture.