International Journal of Multidisciplinary Research and Publications ISSN (Online): 2581-6187 136 Ahmet Hadrovic, “Light in Mosque Design,” International Journal of Multidisciplinary Research and Publications (IJMRAP), Volume 5, Issue 4, pp. 136-146, 2022. Light in Mosque Design *Ahmet Hadrovic Faculty of Architecture, University of Sarajevo, Sarajevo, Bosnia and Herzegovina Email address: hadrovic.ahmet@gmail.com, ahmet.hadrovic@af.unsa.ba Abstract— The topic 'LIGHT IN SACRED ARCHITECTURE' is very complex and it can be approached, with the same rights and competences, by interpreters of religion, philosophers, all artistic expressions, designers (especially lighting designers), people of various practical activities, etc. In this paper on the topic 'LIGHT IN MOSQUE DESIGN' an architect and university professor writes, i.e. a person who educates students of architecture in its various fields and a person who designs himself (who has more than ten architectural realizations of sacred buildings). The paper develops the historical, philosophical, religious, psychological and aesthetic dimensions of the issue of the presence and use of light in sacred architecture. The intangible and ubiquitous phenomenon of light builds architecture and fills its spaces, appealing to our emotions. Thus, both natural light and artificial lighting serve to get to know special places in the architecture, and then give those places a special character. In the detailed descriptions of architectural objects and the circumstances in which these objects are created, we conclude that light is a co-creator of architectural forms and spaces - from the rudimentary way in which it helps to identify space to the sophisticated ways in which it participates in the creation of a transcendental atmosphere. Keywords— Light, Sacred architecture, Islam, Mosque. I. INTRODUCTION With his doctoral dissertation (“Defining architectural space on the example of a town house in Yugoslavia”, 1988), the author laid the foundations of the theory of Architecturally Defined Space (architecture) and opened countless paths of 'searching for architecture'. He presented his search for architecture through a series of published books - university textbooks, scientific books, monographs and travelogues [1] . As the textbooks threatened the curricula of certain subjects, some architectural topics were always left unfinished, that is, some dimensions of architecture were dealt with from the aspect (curriculum) of the specific 'subject' that he taught at the Faculty of Architecture of the University of Sarajevo. For this reason, as an 'extension of the content of university textbooks', he covered certain topics in new books and scientific papers. Thus, for example, the university textbook “Architectural Physics” (1996, 2010) experienced its extension through a series of books (university textbooks and scientific books) [1] . The same was done with other, fundamental, university textbooks: Constructive systems in architecture, Architectural constructions VI, Bioclimatic architecture, Conceptualization and materialization of the boundaries of Architecturally Defined Space. 'The search for architecture' of the author of this work (from the doctoral dissertation to the present day) symbolically is presented in Figure 1. Figure 1. Development of the theory of Architecturally Defined Space through published books Source: Author (2021) In the university textbook “Architectural Physics”, the author dealt with light from a purely physical aspect and the relationship between man and light, determining the 'definitional area of human comfort from the aspect of vision conditions': “Similar to heat and sound, light has its objective dimensions that define it (wavelength, frequency, energy, various types of behavior when spreading through space, etc). From the aspect of Architecturally Defined Space (ADP), light is interesting as a tool that enables not only seeing, that is, collecting information from the environment, but also the mechanism of that seeing, as well as the quality of seeing. This means that man is a special system through which the objective dimensions of light are refracted to form an image of reality, along with a series of subjective dimensions of each individual”. “The concept of illumination has, on the one hand, purely physical dimensions by which light is treated as a special form of energy , and on the other hand, those dimensions that express a person's relationship to the world around him. On the physical plane of consideration, light is treated as part of the spectrum of electromagnetic waves, which is determined by a series of physical quantities: speed of propagation, frequency, wavelength, amount of energy, as well as the lawfulness of their propagation through certain environments. On the subjective plane of consideration, light is treated as a means through which a person acquires information about his environment. From the aspect of