Aim of this master's thesis is to see whether Baltazar Adam Krčelić, while he was writing his two literary works, Historiarum Cathedralis ecclesiae Zagrabiensis partis primae tomus I and Scriptorum ex regno Sclavoniae a seculo XIV. usque ad XVII. inclusive collectio, reiterated the same texts about bishops who were also writers and to what extent are these texts congruent. The bishops who appear in both works are bl. Augustin Kažotić, Nikola Olah, Pavao Gregorijanec, Juraj Drašković and Nikola Stepanić Selnički. The thesis presents Krčelić's biography and a brief historical overview of biography as a genre. The selected biographies and the facts that Krčelić brings about the persons mentioned are being compared. Biographies were compared in terms of their extent and the facts presented. At the very end of a master's thesis it is concluded that Krčelić's two works are not exactly the same: the extent is completely different. As far as the facts about specified bishops are concerned, although some of them are repetitive, it can still be said that for the most part Krčelić was original and that he presented the data in each work in a different way.