Problem statement: Purity is one of the postulates that has been continuously employed in Iranian architecture, especially in Bathhouses, and has climaxed over time. This idea is well manifested in the development of iconographies. Bathhouse literary works have created a critical treasure for purification discussions in iconography. The existence of different iconographies of Bathhouses affirms this claim.

Research objective: This study aims to recognize and examine the postulate of purification and its manifestation in iconographies left in Iranian baths.

Research method: The method of this research is descriptive-analytical. Ten samples of iconography from the books Haft Aurang (Jami), Divan Turki (Amir Alishirnavaei), Khamseh (Nezami), Masnavi Mehr-o-Moshtari (Assar Tabrizi), Zafarnameh , Shahnameh (Ferdowsi), and Masnavi Manavi (Rumi) were examined in this research.

Conclusion: The diversity of tools and people shows that details have been employed to better demonstrate the principles of purification. For ease of legibility, the applications of each section are provided. Furthermore, the performance of the components and people bilaterally related to each other and indicating the most commonalities in the works left in the iconographies and the differences in the decorations and details of each iconography was examined. The functional dimension has many similarities with the physical aspect. In paying attention to commonalities, this dimension has applied specific strategies, principles, and patterns and created innovations in demonstrating purification.