Aims & Backgrounds: This research presents a comprehensive analysis of the spatio-functional organization of the historical mosques of Isfahan, Iran, with the principal objective of decoding the intricate interplay among geometric principles, behavioral patterns, and perceptual meaning. The significance of this inquiry is rooted in the mosques' foundational role as core institutions that have historically shaped the physical, social, and cultural morphology of Islamic cities. These structures consistently transcend their primary liturgical function to operate as complex socio-cultural entities, wherein their spatial configuration is understood as a direct manifestation of a specific cosmological worldview and a sophisticated semantic system. Despite extensive scholarly work in Islamic architecture, a pronounced epistemological gap persists in the systematic understanding of the dynamic, intrinsic relationships among spatial syntax, embodied user behavior, and phenomenological perception, particularly in the Iranian context. Prevailing research trajectories have often privileged either aesthetic and ornamental analyses or isolated morphological examinations, thereby largely neglecting the holistic and reciprocal dynamics that interlace architectural form with human praxis and experience. Three pivotal questions guide the research: first, to identify the core geometric and organizational principles underpinning the spatial structure; second, to elucidate how these principles correlate with and facilitate specific behavioral and functional patterns of users; and third, to extrapolate how the resultant findings can effectively inform contemporary practices in architectural conservation, urban regeneration, and the design of new religious spaces, thereby contributing to the revitalization of Islamic architectural identity in a modern context.
Methodology: This study is framed within an interpretative research paradigm and operationalized through a sequential mixed-methods design that integrates qualitative depth with quantitative validation. The philosophical underpinning is rooted in interpretive epistemology, which posits that social and spatial realities are not pre-given but are constructed and acquire profound meaning within specific historical, cultural, and social contexts. The qualitative phase involved in-depth, semi-structured interviews with a carefully selected cohort of 10 recognized experts and specialists in Islamic architecture, architectural history, and urban conservation. The sampling strategy was purposive and continued until theoretical saturation was achieved. The interview protocol was designed to elicit rich, nuanced data on core concepts related to spatial organization, functional hierarchies, geometric logic, and the relationship with the surrounding urban fabric. The collected qualitative data underwent a rigorous thematic analysis, facilitated by MAXQDA (version 2022). This process advanced through the systematic stages of open, axial, and selective coding. The initial open coding phase distilled the raw data into fifteen primary codes. Subsequent axial coding organized these codes into a coherent structure of seven overarching theoretical categories, which collectively form the core of the analytical model. The reliability of the coding process was robustly established using inter-coder agreement percentage, which exceeded the accepted threshold of 60%, thereby confirming the analytical rigor. The emergent qualitative framework then served as the foundation for the quantitative phase, which involved developing and distributing a structured questionnaire to a separate group of 30 specialists in architecture and urbanism. The data from this questionnaire were analyzed using descriptive statistics and the Coefficient of Variation (C.V.) to quantitatively assess the relative importance and consensus regarding the identified components. The questionnaire's internal consistency and reliability were confirmed by a Cronbach's alpha coefficient of 0.834, indicating high reliability.
Findings: The spatial domain of this research is deliberately focused on the historically significant mosques in the urban core of Isfahan, a city renowned as a paragon of Islamic urbanism. The case studies include, but are not limited to, the Jameh Atiq Mosque, the Imam Mosque, the Sheikh Lotfollah Mosque, the Hakim Mosque, the Seyed Mosque, and the Now Bazaar Mosque. These edifices were selected as exemplary specimens for their historical stratification, outstanding architectural merit, and, crucially, their continuous performance as active centers of religious, social, and cultural life.
The research complex organization is explicable through a conceptual model comprising seven principal theoretical categories: Spatial Organization and Configuration, User Spatial Perception, Spatial Unity, Spatial Proportions, Construction Technology, Spatial Zoning, and Spiritual Tranquility. A detailed quantitative prioritization of the components within these categories identified several factors as paramount. The most influential components for spatial coherence and user satisfaction were found to be: "horizontal expansion of functional spaces while maintaining spatial autonomy" (Mean = 3.58, C.V. = 0.294), "modular and network-based organization of spatial elements" (Mean = 3.46, C.V. = 0.338), and "function-based spatial zoning" (Mean = 3.35, C.V. = 0.346). Other significant components included "inviting entrance portals and the creation of a tranquil, mediating space in the entry vestibule" (Mean = 3.57, C.V. = 0.350) and "legibility and visual aesthetics achieved through a structurally ordered composition of forms" (Mean = 3.12, C.V. = 0.368).
Conclusion: The spatial organization reflects Gestalt principles and environmental psychology, in which the whole derives meaning from the relationships among its parts. This is evident in sequences such as the entrance-courtyard-prayer chamber progression, where golden-section proportions, symmetry, and hierarchical transitions in volume and light create continuity, anticipation, and spiritual focus. The study also links spatial coherence to functional zoning and spatial legibility. The sophisticated hierarchical arrangement of entrances, the deliberate sequencing of circulation paths, and the strategic placement of pause spaces are all designed to intuitively reinforce the user's wayfinding, sense of centering, and comprehension of the internal spatial order. The research further concludes that the palpable relationship between the spatial structure and the user's feeling of tranquility or belonging is deeply rooted in the human-centric ethos of Islamic architecture. The meticulous attention to anthropometric proportions, the psychological impact of controlled spatial heights, and the masterful manipulation of natural light for both illumination and symbolic purpose are identified as key factors that collectively enhance the user's feeling of security, comfort, and spiritual serenity.
From a functional perspective, the findings demonstrate that while the liturgical and ritual function remains the central organizing principle, it successfully integrates a spectrum of cultural, educational, and social performances within the spatial schema. The presence of multifunctional spaces such as auxiliary prayer halls, shaded porticoes (riwaqs), and secondary courtyards provides clear evidence of a design intelligence that intentionally facilitates and encourages social interaction, communal gathering, and the transmission of knowledge. The research ultimately concludes that geometry in Isfahan's historical mosques is not merely a utilitarian or decorative tool, but rather a profound conceptual framework for synthesizing ritual experience, social interaction, and sensory perception. This synthesis effectively represents what can be termed a "social logic of space," where architecture becomes an active agent in structuring community and spiritual life. The celebrated unity of these spaces is thus theorized as the emergent property of a symbiotic coexistence of form, function, and lived experience within a specific cultural and sacral framework, where layers of symbolic meaning are intrinsically embedded within the very logic of the proportions, the sequence of spaces, and the inherent geometry of the structure.
The primary theoretical contribution of this work is the development of a comprehensive conceptual model that effectively elucidates the dynamic interconnections between form, function, and meaning in Islamic sacred architecture. This model carries significant practical implications for several applied fields. For sustainable heritage conservation, it provides a nuanced framework that advocates for management strategies focused on preserving the inherent spatial order and functional hierarchies, moving beyond a superficial focus on decorative elements. For urban regeneration in historic contexts, it offers insights into sensitively managing the reintegration of mosques into the contemporary urban fabric. For contemporary architectural design, the findings serve as a valuable repository of timeless principles, demonstrating how traditional wisdom regarding proportion, light, sequence, and hierarchy can be reinterpreted to create meaningful, spiritually resonant contemporary mosques that remain deeply connected to their cultural lineage while addressing modern needs. It is important to acknowledge the limitations of this study, primarily its geographical focus on Isfahan, which may limit the immediate generalizability of the findings to other regions.
Furthermore, the reliance on expert perception, while valuable, underscores the need for future research that incorporates direct behavioral observation, movement-tracking technologies, and more extensive syntactic analysis (Space Syntax) to provide a more objective and granular understanding of user behavior in these complex spatial environments. Future comparative studies between historical and contemporary mosques could also yield valuable insights into the evolution or disruption of these spatial principles. In conclusion, this research demonstrates that a deep understanding of the inherent logic governing the spatial organization of historical mosques provides an indispensable theoretical and practical foundation for reimagining and advancing the future trajectory of Islamic architecture in ways that are both authentic and innovative.