The series follows Cyril and Methodius, two Byzantine Greek brothers born in the 9th century. They became missionaries of Christianity and influenced the cultural development of the Great Moravian territory. Roman Zach, Ondřej Novák, Josef Abrhám, Milan Bahúl, Petr Borovec, Jiří Böhm, Vladimír Javorský Added on Amazon Prime 2022-12-02.