Peter I was bishop of Pécs between 1306 and 1314. He was appointed bishop by Archbishop Thomas of Esztergom at the end of 1306 after the canons of the cathedral chapter of Pécs did not reach a consensus on the succession of the elected bishop Manfred who had died at the beginning of the year. Before his appointment, Peter was dean of Tolna County. He had also been vice-chancellor of Charles of Anjou (the claimant supported by the Holy See to the Hungarian throne) from 1303 the earliest to 1306.