Graffiti content analysis of the historical sites in Yazd city and effective factors in

This research has been done to determine and explain graffiti of historical sites and its influencing factors. Direct observation is selected as the method and content analysis as the technique among 23 monuments of the city of Yazd and stratified sampling is used (systematic) concerning frequency of shapes and Images and carved terms. Research findings are based on 2204 entries such as words, shapes and images and categorizations: date (time), writing graffiti, age, city of residence, ethnicity, gender, genus or materials and tools used, poem and lines, carved first and family names, and the English letters. One of the most important factors that influences graffiti phenomenon is the lack of attention and neglecting toward these monuments. The preservation of monument is not considered as a value, so the distortion and preparations for destruction is not a counter value and nothing is done for maintenance and preservation of the monuments