The paper is devoted to the gradual fictionalisation of historical text, which is observed in Manuscript B of the Old Bohemian Annals. The fictionalisation is related to the gradual transformation of annalistic records in the medieval chronicle. This transformation is connected inter alia with a chaneg of the function of the text, when an entertainment function was added to the original informative, didactic and possibly also agitating functions. In the text investigated, fictionalisation lies in compositional and topical alterations, in the individualisation of the text and particularly in the stylisation of the text, influenced by fictionalisation elements. and Alena M. Černá.