EN
The Great Moravian princes always fought for the independence from the Frankish Empire. One of the ways to reach it was the achievement of own Slavic independent hierarchy. The mission from Byzantine Empire led by brothers Constantine and Methodius came to fulfill this task. It brought the Slavonic liturgical books and basic law to the Great Moravia. However, the sources do not specify concrete liturgical tradition that had been translated into Slavonic. Common hypothesis says that it was the liturgy of Constantinopolitan tradition that had been translated by brothers Constantine and Methodius in 9th century. If this was true, how did this liturgy look like? Another hypothesis says that the liturgy of St. Peter was translated, or even the Roman liturgy might by the one. The present paper examines all these possibilities and searches for the most probable answers to those questions.