The article entitled Béla Bartók’s “Bluebeard’s Castle” – the opera of the turn of styles is an attempt to show remarkable philosophical and artistic values of this work. In the article we can find a brief historical outline of the Hungarian opera and a discussion of Bartok’s works. The basis of the libretto of the opera – a tale of Bluebeard is the next issue subjected to further analysis. Moreover, the previous interpretations of the legend’s message are also presented. In the second part of the article, the origin of the opera Bluebeard’s Castle B. Bartók, the libretto, musical and theatrical conception of this work are also discussed. The article is complemented by the full text of the libretto in the author’s own translation (from English into Polish).