the status of the bishopric of poznań of bishop unger, whose diocese had also comprised gniezno before and who had not supported the creation of a separate archdiocese in gniezno, is also subject to historical debate. one view holds that it stayed independent and with unger as a missionary bishop directly subordinate to the pope while another one holds that it was attached to the archbishopric of magdeburg, the nearest german ecclesiastical province. however, generally, the congress is seen as having established complete ecclesiastical independence of the polish church from magdeburg.