Summary Mürsel Gündoğdu's novel "In the City of the Heart" was examined in the context of Joseph Campbell's "Monomith" theory. In his work "The Hero's Endless Journey", Campbell presents the "Monomyth" theory, which explains the common points of heroes in all myths. This theory explains the hero's journey in three basic stages: Departure, Initiation and Return.The aim of the research is to determine to what extent Ghazali, the protagonist in the novel "In the City of the Heart", fulfills these three stages. This study, which is a qualitative research, was conducted using the document analysis method. As a result of the analysis of the novel, it has been determined that Ghazali acts in accordance with Campbell's "Monomith" theory.Ghazali set out with an inner call, transformed himself by going through spiritual and physical tests, and ultimately returned with knowledge and wisdom. During this process, Ghazali's experiences and inner journey confirm the stages in Campbell's theory. Ghazali's journey represents a cultural and individual transformation.The novel details the protagonist's internal conflicts, spiritual quest, and eventual self- realization.The universality of Campbell's "Monomyth" theory is once again confirmed in Ghazali's journey.It is seen that heroes of different cultures go through similar stages and follow the same basic cycle. This study shows that the common points of cultural stories can be based on a scientific basis and offers an important model that can be used in literary analysis.Campbell's "Monomyth" theory is used in literature, cinema and other branches of art. Key Words: Monomyth Theory, In the City of the Heart, Ghazali