Some historians argue that Felician perhaps served as either Bishop of Transylvania (e.g. János Viczián) or Eger (e.g. Gyula Pauler) before his election as Archbishop of Esztergom.
Majority of the historians, including Attila Zsoldos and Margit Beke argue Stephen II issued the charter around 1125–28,[3] while Imre Szentpétery dated the narration to the years between 1127 and 1131.
[4] After Hungarian troops plundered and looted the estates of the Archbishopric of Salzburg in the summer of 1131, Felician mediated between Béla II and Archbishop Conrad to facilitate the conclusion of peace, which was made in Esztergom and it was followed by a long period of stability in the border region.
Felician was present at an assembly of the prelates and barons in 1137 in Esztergom, when the child prince Ladislaus was proclaimed Duke of Bosnia by his father Béla.
[3] His name is recorded by a 15th-century annotation in a 13th-century famous manuscript Psalterium Davidicum cum calendario, part of the collection of the Batthyaneum Library in Alba Iulia.