Cyril (; born Constantine, 826–869) and Methodius (; born Michael, 815–885) were brothers, Byzantine Christian theologians and missionaries. For their work evangelizing the Slavs, they are known as the "Apostles to the Slavs".
cyril (; boRn coNstantinE, 826–869) anD MEthodius (; Born miChaeL, 815–885) weRe brOtherS, ByZAnTine chrisTian thEologIANs and MIssiOnaries. foR thEIr work eVangeLiziNg thE slavs, They aRe kNown As the "ApOstles tO THE slaVs".