The book About interreligious dialogue from a Catholic perspective. An insight into the basic concepts and teaching of the Church aims to present the general principles that are important for understanding and practicing interreligious dialogue, based on the starting point of the Catholic theology of religions and the official teaching of the Catholic Church. The book is divided into four parts. In the first part, a broader insight is given into the basic concepts that are closely related to interreligious dialogue, namely tolerance in its positive form, dialogue as a dynamic form of communication, the ambiguous concept of religion with an emphasis on its anthropological and internal, i.e. spiritual aspect and, finally, the main notion of interreligious dialogue and all that it implies and includes. The author takes these concepts as an epistemological framework that sets the main philosophical-theological and communicological determinants indispensable in the active understanding of interreligious dialogue. The second part of the book deals in more detail with the teaching of the Catholic Church on interreligious dialogue, starting from the theological and pastoral guidelines of the Second Vatican Council, by which the Catholic Church opened itself to the modern world, wanting to establish fraternal dialogue and cooperation with all people of good will. After highlighting the theological keys and other premises of the Council’s speech on dialogue and religions, the author pays special attention to the declaration Nostra aetate on the Relation of the Church with Non-Christian religions. After that, he recalls the novelty and great contribution that is the encyclical Ecclesiam suam of Pope Paul VI. contributed to the Church’s reflection on dialogue, and provides an overview of the main initiatives and documents of the Post-conciliar Church on religions and interreligious dialogue. Special attention is paid to the important contribution of the three last popes – John Paul II, Benedict XVI and Pope Francis – in promoting interreligious dialogue. In the third part, the author briefly presents the dialogue guidelines of the Catholic Church towards the increasingly widespread need for intercultural dialogue. The last part of the book is dedicated to interreligious dialogue in Croatia, providing a rounded overview of the main social and religious factors, actors and initiatives in the field of interreligious, and to some extent ecumenical and intercultural dialogue. At the end of the book, there is a thematic bibliography on interreligious dialogue in the Croatian language. With this concise book, the author wanted to contribute on a scientific and practical level to the development of the theology of interreligious dialogue, which is very important and widespread in the world today, but which is almost completely lacking in Croatia and the wider region. At the same time, this book announces much more extensive scientific research on interreligious dialogue, which is in preparation.