In the latter year, the abbot Stephen of Tournai wrote a letter to Béla III of Hungary to inform him that one of those clerics, Bethlehem, died of illness, while his three companions, including Adrian were present on his deathbed.
Historian György Györffy argued Adrian was one of the high-born clerics, who were sent by Béla III to France to benefit from higher education.
[5] Job and Adrian were jointly sent to the Kingdom of France as envoys of Béla III, in order to find a bride for the king (whose wife Agnes had died in the year 1184).
[5] His episcopal activity was completely covered by a jurisdictional conflict with the newly founded the collegiate chapter of Szeben (present-day Sibiu, Romania).
The "free" provostry was established by Béla III in 1189 with the intention to grant a separate church representation to the Transylvanian Saxons, who gradually settled down in the southern part of Transylvania since the reign of Géza II.
Upon the instruction of Pope Celestine III, Gregorius recalled that when he asked Béla, who resided in Veszprém with his barons then, responded that when he founded the provostry of Szeben, he had no intention of subordinating all Transylvanian Germans under the collegiate chapter, only those who were settled in the uninhabited wilderness given by his predecessor Géza II – that is, in the region of Altland (in the valley of the river Olt or Alt).
According to a bull of Pope Honorius III from June 1222, Adrian once attacked the abbey with his soldiers, destroying its buildings, confiscating its privilege letters and capturing the abbot.
According to Sebestyén, the author uses the French transliteration of antique names in many cases in his work, while his remark "now ... the Romans graze on the goods of Hungary" refers to his conflict with the collegiate chapter of Szeben.