In Develi, which is located on the skirts of Mount Erciyes which is the most important factor in shaping the geological forms and soil structure of the Cappadocia Region, the material formations caused by the volcanic activities have significantly affected the architectural form. When the materials used in the traditional structures in the region are examined; it is seen that pozzolanic material or lime mortar with gypsum added is prefered, while soil is used in the mortars of some walls, it is rarely found in brick and mudbrick walls, where the andesite and basalt tuffs from the quarries around Erciyes Mountain are used as basic masonry materials. Within the scope of this study, the mosques in the building types that played an important role in shaping the Develi urban texture were researched and the usage areas and shapes of the stone materials were investigated. In this context, Develi Ulu (Sivasi Hatun) Mosque, Kopçullu (Karabey) Mosque, Cami-i Kebir, İniler Mosque, Köşkerli Mosque, Yedek Mosque, Meteris Mosque, Tirem Mosque, Dedemen (Çay) Mosque, Nalbant (Asagi Fenese) Mosque and Reşadiye Mosque were examined and the place and the importance of stone material in the construction system were evaluated.