«Pascendi Dominici Gregis» is an important encyclical written by Pope Pius X in 1907and its full title in English is «On the Doctrines of the Modernists.» This encyclical is a significant document in the history of the Catholic Churchas it addresses the issues and challenges posed by modernisma theological and philosophical movement that emerged in the late 19th and early 20th centuries.In «Pascendi Dominici Gregis » Pope Pius X condemns various aspects of modernismwhich he sees as a threat to traditional Catholic doctrine and faith. He criticizes modernist tendenciesincluding the questioning of the Church’s authoritythe interpretation of scriptureand the relationship between faith and reason. The encyclical outlines and refutes many of the central tenets of modernismasserting that they are incompatible with Catholic teachings.Pope Pius X’s encyclical serves as a significant response to the challenges posed by modernism within the Churchand it outlines his concerns about the potential erosion of traditional Catholic beliefs. The encyclical also lays the foundation for the Church’s stance against modernisma stance that would continue to influence Catholic theology and teachings in the years that followed.