In Bosnia and Herzegovina, a relatively large number of mosques were built during the Ottoman Empire (15th-19th century). During the SFRY (Socialist Federal Republic of Yugoslavia, 1945-1992), the socialist era, religion was on the margins of society, and the construction of new mosques was the hands of traditional masters who followed mainly the patterns of Ottoman mosques. There are rare exceptions, such as the White Mosque in Visoko (architect Zlatko Ugljen, 1983). After the war in Bosnia and Herzegovina (1992-1995), there was a change in the social order and composition of Bosnia and Herzegovina as a state, where (now in the capitalist system) many freedoms were open, including religious ones. The construction of sacral buildings has become a public matter of society where architects are also involved. The author of this paper was given the opportunity to design mosques, where, as a basic approach in design, he wanted to create modern buildings that will, in addition to the basic prayer space, have a number of other contents (covering both religious and secular needs of people). In addition, it was a good opportunity to apply new architectural and spatial concepts, new constructions and materials in the design of mosques, as well as the aesthetics rooted in the foundations of Islam as a universal view of the world. In his designs of mosques (ten realized and several at the level of the conceptual design), the author of this paper paid special attention, in addition to liquid functional flows, to the role of light in design, both daylight and artificial lighting.