Yazd city is the first adobe and the second historical city in the world. Placement of valuable historical texture of this city in a circle of worn out context has caused the Gradual burial of social, economic, skeletal and functional life especially in the public spaces of historical core of town. In addition, the expansion of urban crime and increasing social vulnerability in the region reduced the high value of this texture and has faced the valuable historical public spaces with matters like security reduction, street harassment and reputation of insecurity that makes the most attractive tourist area of Yazd not to have a worthy attention especially to the citizens. One of the fundamental objectives of the public spaces of the city design, maintain security and tranquility that is achieved through the expansion of a physical security system. On this basis we must make these spaces in a way that contains sufficient capacity of security for the presence of all social groups. Within the scope of the historical areas that are valuable heritage of the past, the design should be conducted very cautiously. So this research in a manner of descriptive -analysis examine the impact of skeletal features of public spaces to create the local security and Environmental comfort. And address with a definition of secure spaces and its position in city of Yazd and exciting crimes in the historical core Centre of it (Fahadan neighborhood). And among the physical environmental factors it considers the impact of light factor in preventing the urban crimes and examines the rate of its dependency with security and insecurity. Finally, in order to increase security, and using the obtained data, some solutions are offered in accordance with special historical and value features of Fahadan.
Keywords: Fahadan-Yazd, Secure urban space, Security, skeletal physical features, urban crime
