The restoration project of Murat Hüdavendigar Mosque Cuma Mosque commenced in 2006. The project was financed by Istanbul Metropolitan Municipality and undertaken by Taşyapı as the contractor. Structural conservation work of the project is concluded. In this context, domes, main walls, minaret and pillars have undergone restoration and conservation processes. The processes which were applied by remaining true to original appearance and materials of the building will be explained and certain findings on structural techniques arising during restoration will be presented in our paper to the attention of researchers. In addition to restoration techniques, other information on methods, materials and material characteristics will be included in the paper