Stages of Transition from Separation to Union in the Architecture of Interstitial Spaces: A Case Study of Imam Mosque, Isfahan

Interstitial space in architecture serves as a realm for the transition from the material world to the spiritual domain. This study aims to explore the stages of transition from separation to union in the interstitial space of architecture, focusing specifically on the Imam Mosque of Isfahan. The interstitial space, as a third space that facilitates transition, is related to movement, direction, and destination, guiding the individual from appearance to essence. The research method is a mixed (qualitative-quantitative) approach, utilizing library studies, spatial arrangement analysis, and field research with DepthMap and SPSS software. The findings suggest that interstitial spaces create a hierarchy of movement and perception, providing a platform for spiritual proximity along a path toward a defined destination, leading to mental and emotional transformation of the user.The transition from exterior to interior in architecture is deemed as one of the most fundamental debates addressed in the present research within the context of liminality. Liminality implies an in-between and mediatory state in architecture which refers to two positions of being in-between proximity or elevation to reach the final resting destination of stability. In the architectural world liminality represents closeness to communion with the goal akin to an intuitive command and makes architecture to have levels and stages. The most significant goal of the present dissertation is proximity to truth in transition from external to internal examining its levels and orders.