It was aimed in this study to determine the effects on the perceptual evaluations of participants for the design differences of mosque facades that were shaped according to periods, countries and architectural trends within the geographical boundaries where the Islamic religion spread. With this purpose, 100 participants treated in 3 groups (Seljukid period, Ottoman period and Turkish Republic Period) were evaluated with the semantic differentiation scale, which covered the variables of preference, complexity, impressiveness and stimulative of the facade visuals of 16 different mosques. In conclusion, the data obtained on the mosque visuals, which were used in the survey study, showed that there was a statistically significant differences among the variables of complexity, preference, impressiveness and stimulative and it was determined that there was a reverse U-shaped relationship between the variables of preference and complexity in the evaluation of mosque. Then, to examine the effect of age, gender and education level on participants evaluations of the mosque visuals, the one-way analysis of variance was applied. Accordingly, it was determined that the male participants displayed a more negative approach compared to female, middle-aged participants (36-50 years of age) compared to young participants (22-35 years of age), participants with higher education compared to participants with secondary education. According to results; the Ottoman period mosques were more complex compared to the others, they were preferenced more and found to be even more effective and stimulating.
