Recognition of light-openings in Iranian mosques’ domes with reference to climatic properties

Mosque architecture is considered as a potent visual symbol of the Islamic architects’ design ability. Prayer-hall as the manifestation of equality between the believers and the unity of architectural space has challenged such an ability throughout the history. This study, considering the characteristics of light-openings in the domes of Iranian mosques’ Prayer-hall, aims to investigate these domes’ possible relationship with the climatic features of each mosque. To this end, eighteen case-studies according to the research analytic approach are studied to determine: 1. the relationship between the mosques construction period (Iranian architecture styles) and its light-openings number on the one hand and its climatic features on the other hand, 2. The relationship between the light-openings’ location and the climatic features of each mosque, 3. The relationship between the light- openings’ number and the climatic feature of each mosque and finally, 4. The relationship between the prayer-hall’s height and the number of light openings of each mosque on the one hand and its climatic feature on the other hand. The study shows that Iranian architects have given considerable priority to the natural ventilation function of the light-openings, So, what used to be considered as the domes main function, allowing the light to the interior space, is considered as their secondary function.