Upon Methodius's request, in June 880 Pope John issued the bull "Industriae tuae" for Svatopluk whom he addressed as "glorious count" "(gloriosus comes)". In the bull, the pope refers to Svatopluk as "the only son" () of the Holy See, thus applying a title which had up to that time been only used in papal correspondence with emperors and candidates for imperial rank. The pope explicitly granted the protection of the Holy See to the Moravian monarch, his officials and subjects. Furthermore, the bull also confirmed Methodius's position as the head of the church in Moravia with jurisdiction over all clergymen, including the Frankish priests, in Svatopluk's realm and Old Church Slavonic was recognized as the fourth liturgical language together with Latin, Greek and Hebrew.