 The initial ecclesiastical affiliation is uncertain, it was subordinate to either "Split" or "Durazzo", both then Byzantine (Patriarchate of Constantinople).The church served as seat of the Serbian eparchy, as the rotunda plan is characteristic of first court chapels.The bishopric was established shortly after 871, during the rule of Prince Mutimir (r. 850-891), and was part of the general plan of establishing bishoprics in the Slav lands of the Empire, confirmed by the Council of Constantinople in 879-880.