The information given in passing by the oldest Polish chronicler, Anonymus Gallus (lib. I cap. 11), that during the reign of Bolesław the Brave (992-1025) there were two metropolises in Poland with their own suffragans, gave rise to many assumptions and interpretations among later historians. Apart from numerous nuances, two views can be distinguished. Some researchers understand the statement of the anonymous author to mean that the Archbishopric of Gniezno, founded in 1000, covered only the western lands of Poland with the bishoprics of Kraków, Wrocław, Poznań and Kołobrzeg, while the eastern lands, i.e. Masovia and Kujawy, were covered by the Archbishopric of Gniezno. Masovia with Kujawy and the northern districts of Lesser Poland with the later bishoprics of Włocławek (Leslau) and Płock and the archdeaconry of Sandomierz were under the jurisdiction of another archbishop. In this context, missionary Archbishop Brun von Querfurt was mentioned as a putative metropolitan with a putative seat in Sandomierz; with his martyrdom in 1009 on the border of Prussia and Lithuania, this archbishopric disappeared. However, this hypothesis is difficult to maintain because it is not credible that the Archbishopric of Gniezno, founded in 1000, did not cover the north-eastern areas of Poland; furthermore, the claim that Brun of Querfurt was a missionary archbishop is contradicted by the sources, since they only mention him as a missionary bishop endowed with a pallium. Other researchers - dissatisfied with the existence of another Romanesque-Latin metropolis in Poland around the year 1000 - want to see the second archbishopric as an archbishopric of the Slavic rite based in Krakow and associate it with the missionary activities of the Archbishop of Moravia Methodius (+ 885). This hypothesis also has no source justification and is therefore difficult to seriously analyze. The discussion about the second archbishopric was, it seems, steered in the right direction by the distinguished Polish Church historian Władysław Abraham, who in his article on the relationship between the archbishoprics of Gniezno and Magdeburg (+ 920), entitled Magdeburg (+ 920), attributes the idea of founding the second archbishopric in Poland to Bishop Unger of Poznań. This assumption is made by the author of the above article and developed in the sense that the previous missionary bishop of Poland, Unger, who was entrusted with the newly established diocese of Poznań in 1000, did not recognize the authority of the new Archbishop of Gniezno, Gaudenty-Radzim, and then in 1005 he subordinated himself and his diocese to the Archbishop of Magdeburg as suffragan. This connection between Magdeburg and the Poznań diocese lasted until the death of Bishop Unger (+ 1012). During this period, i.e. in the years 1004-1012, two archbishops exercised their metropolitan rights in the territory of then Poland. The fact that only one archbishopric, Gniezno, is documented in a later period proves that it was a transitional state.