The two brothers became missionaries of Christianity and created the Glagolitic alphabet, the first alphabet used to transcribe the Old Church Slavonic language. They are venerated in the Eastern Orthodox Church as saints with the title of "Equals to the Apostles".
Dvojica braće postali su misionari kršćanstva i sastavili su glagoljicu, prvi alfabet koji se koristio za zapisivanje starocrkvenog slavenskog jezika. istočna pravoslavna crkva proglasila ih je svecima s nazivom "apostola".