This thesis is about the literary and cultural work of Ana Katarina Frankopan Zrinski (d. 1625–1673). In the first part, the author describes Katarina's biography, her literary work in literary works of historiography, and her cultural activities, that is her concern for books to be printed and distributed among readers. In the second part of the thesis, author presents a work published under Catherine's patronage, the prayer book Dvoji dušni kinč, by Baltazar Milovec. Afterwards Katarina's prayer book Putni tovaruš is analyzed, with an emphasis on the author's preface and introductory poem. Later is followed by a presentation of the collection of poems-fortune tellers Sibila, which is proof of the existence of popular entertainment forms at the courts of Zrinski and Frankopan. In the central part of the thesis, author analyzes in detail recently found Songbook of Ana Katarina Zrinske, which shows Katarina's versification skills, but also the importance of her role in the Ozalj language and literature circle and in literary historiography. Finally, Katarina's cultural-political influence in the creation of the Zrinsko-Frankopan cult is presented, as well as the literalization of her character from demonization in political songs after conspiracy through national heroine in 19th and 20th-century literary works to contemporary works.