A boszniai latin püspökség története 1344-ig

The first written source concerning the Bosnian Latin bishopric originates from 1089. The bishopric mostly belonged to the jurisdiction of the Archbishopric of Raguza. During the 13th century the Bogomil heresy spread to the point that the pope was forced to intervene: in 1234 pope Gregory IX placed the Bosnian bishopric under his own jurisdiction, and he put John of Wildeshausen, Dominican inquisitor, in the position of the Bosnian bishop. The problem of widespread heresy was so serious that John bishop had to give up his position after a year. In 1238 a Hungarian Dominican, Pósa was elected as Bosnian bishop: it was the beginning of the remarkable presence of the Hungarian church in the Banat of Bosnia. When Pósa tried to stabilize the position of the Catholic Church in Bosnia, he gradually lost ground in the province, and in 1239 he was forced to flee to the southern part of the Hungarian Kingdom. He was given two settlements there by Prince Kálmán: Diakóvár (today Đakovo, Croatia) and Blezna in the comitatus of Valkó. In 1247 Pope Innocent IV followed the instructions of Béla IV, the archbishop of Kalocsa, and the Bosnian bishop, placing the Diocese of Bosnia under the jurisdiction of the Archbishopric of Kalocsa. However the official replacement did not happen until the beginning of the 14th century.