ENThe analysis of Jan Dlugosz’s usage of the forged papal bull by Benedict IX for archbishop Aron incorporated in his Catalogue of Cracow Bishops from Vita maior sancti Stanislai by Wincenty of Kielcza shows that he consciously introduced some changes to the bull’s original text to prove that his vision of the oldest history of the Diocese of Cracow could be confirmed by an official papal charter. Unlike previous medieval Polish chroniclers and hagiographers, Długosz stated that in 966, the year in which Mieszko I was baptised, the Archdiocese of Cracow along with the Archdiocese of Gniezno were founded and then the first seven ordinaries of the Cracow church were archbishops. Before the 15th century, there was a widespread opinion that Aron was the only archbishop of Cracow. On the other hand. Długosz, like other medieval historiographers, asserted that Cracow lost its archiepiscopal status due to negligence of Aron’s successor - Lam- bertus Suła. Dlugosz’s vision of the oldest history of the Cracow church was probably inspired by the archetype of The Fifth Catalogue of Cracow Bishops which was written during the pontificate of Zbigniew Oleśnicki, bishop of Cracow from 1423 to 1455. This article demonstrates that Dlugosz’s Catalogue of Cracow Bishops can be seen as a summary of medieval historiographical tradition concerning the existence of the Archdiocese of Cracow in the Early Middle Ages. Furthermore, Dlugosz’s Catalogue of Cracow Bishops was written to justify a peculiar role played by Cracow bishops in the Polish episcopate throughout the centuries and Cracow bishops’ claims to regain archiepiscopal title. Keywords: Jan Długosz, catalogues of Cracow bishops, medieval historiography, charters, forgeries, historical tradition. [From the publication]