Roman Catholic Answer: Cyril and Methodius (Cyril was the name that Constantine took in religion) were missionaries to the Slavs and translated The Bible and the Mass into, what is now called Old Church Slavonic. They even developed an alphabet for this task.
SLAVIC.
Methodius & Constantine.
They were brothers and 9th century missionaries.
The Apostles to the Slavs are Byzantine missionaries were the brothers Cyril and Methodius.
Cyril was the brother of Methodius, 9th century priests who were missionaries to the Slavic people. They translated the Bible into the Slavic language so that the people could understand their religious services.
They were brothers and 9th century missionaries.They were brothers and 9th century missionaries.
Cyril and Methodius were brothers who were Byzantine Christian theologians and missionaries. They are credited with creating the Glagolitic alphabet and translating the Bible into the Old Church Slavonic language, spreading Christianity among the Slavic peoples. They are considered the patron saints of Europe for their efforts in spreading Christianity and promoting literacy among the Slavic people.
They were brothers and 9th century missionaries. They were the principal Christian missionaries among the Slavic peoples of the Great Moravia and Pannonia, introducing Orthodox Christianity and writing to the illiterate, pagans.They are credited with devising the Glagolitic alphabet.
Methodius of Olympus died in 311.
Methodius died on April 6, 885, of natural causes. In other words, he was not a martyr.
Ecumenical Patriarch Methodius III of Constantinople died in 1679.
St. Methodius died April 6, 885, at Moravia (modern Czech Republic)
Cyril and Methodius