 The Ecumenical Patriarch tasked a monk, Hierotheos, with the conversion of Gylas' subjects and consecrated him bishop.Hierotheos accompanied Gylas back to his realm where he converted many Hungarians, according to the Byzantine historian John Skylitzes.Porphyrogenitus associated "Tourkia" with lands to the east of the river Tisza in one of his books written around the same time.