The Name of the Rose is one of the most fascinating novels about an Italian monastery and the mysteries of a murder described by Umberto Eco. This story begins with a kind of preface to the book under consideration. The narrator, Umberto Eco himself, finds a book in 1968, where the events of the 14 th century take place. He introduces a story of Adso of Melk, an elderly Benedictine monk and the narrator, and William of Baskerville, a Franciscan friar, the main protagonist of the story. This novel remains a critical success and one of the bestsellers created by Eco. With the help of this book, he gained recognition as a good scholar and historian, who raised such important for the church issues as heresy, inquisition, and interrogation. These issues are represented by many other writers, like Ronald Surtz, and can be found in various sources, like The Fourth Lateran Council; such wide usage and explanation of these ideas proves their urgency and necessity. In the story The Name of the Rose, the Benedictine monks get to know that knowledge can be rather a dangerous thing. The point is that the truth that is dictated by the leading authority can be considerably different from the real truth, however, not every person can find enough powers to prove it. This is why such awareness may become one of the major reasons for different rebellions and even revolutions, which will certainly destroy the power of the leading authority. Of course, one of the simplest and quickest ways for the authorities to calm down the rebels is to proclaim the existence of heresy and provide inquisition with powers to control the society. Eco is one of those authors, who usually focus on the reader’s participation in the story. He uses the reader’s experience as one of the means to solve the murder and find out the guilty. This author tries to unite several religious conflicts such as absolute truth and personal interpretation of this truth, or the idea of predestination and free will, or the necessity of spirituality and religion. Eco represents these heresies and conflict with the help of numerous political terms and modern context in order to provide the reader with an opportunity to the necessary conclusion independently and grasp the clear meaning of the novel. The philosophy of Aristotle and millenarist heresies, both attract the attention of many readers, who want to find out how heresy was used. “Italy was invaded by these Fraticelli or Friars of the Poor Life, whom many considered dangerous. At this point it was difficult to distinguish the spiritual masters, who maintained contact with the ecclesiastical authorities.” (Eco 53) In order to find out and comprehend the issues of heresy, inquisition, and interrogation, it is necessary to clear up what each of them means in general and analyze the ways of how the author may represent them in the novel. Heresy is a kind of change within a certain system of beliefs that may conflict with the later established rules. The inquisition is one of the organizations, which aim to eliminate all possible threats to the stability set by the ruling authorities. As a rule, inquisitors represent as powerful and intelligent people, who have enough abilities to control the situation and be ready to take certain steps rather quickly in order not to destroy the existed regime. Interrogation, in its turn, is a kind of questioning that is arranged by the police or any other authority to