Peregrin was a Franciscan friar who became a friend of Stephen II, Ban of Bosnia, giving much influence to the order in the country otherwise notorious for its autonomous (and deemed heretical) Bosnian Church.
[4] He assisted Stephen in his efforts to conclude an alliance with Serbia and Venice against Hungary,[4] and was so influential that Venetian authorities instructed their ambassadors to Bosnia to explain their missions to him before approaching the ruler.
[6] Taking advantage of the recent vacancy of the Diocese of Bosnia, the Ban asked the government of the Republic of Venice to intervene with the Holy See and recommend his trusted vicar as the next bishop.
This way he also wanted to prevent disputes over tithes and authority between the bishopric, with its seat in the Croatian town of Đakovo, and the vicariate, members of which were actually active in Bosnia.
[7] Although Peregrin's ordination as Bishop of Bosnia solved the problem of division of authority, after his death on 28 January 1356, Pope Innocent VI did not select a Franciscan again, and the institutions were once more separated.