 At the Council of Chalcedon in 451, Eusebius subscribes simply as Bishop of Apollonia.In the letter of the bishops of Epirus Nova to the Byzantine Emperor Leo I in 458, Philocharis subscribed as Bishop of what the manuscripts call "Vallidus", and which editors think should be corrected to "Byllis".Whether Philocharis is to be considered Bishop also of Apollonia depends on the interpretation of the position of Felix in 431.