the role of geometry of yard in the formation of the historical houses of kashan

Geometry is a basic element for establishing unity in iranian architecture and is the important subject for architects for its discipline and rule. in this regard, the architecture of the house, in terms of its specific functional role, search to implement the principles and geometric rules in the best way and with understanding of the ratio and proportions achieve a correct of the harmony. based on field study in 20 historical houses in kashan, the study search to identify how the geometry is used in the architectural design of the historical houses of kashan. this study is conducted through field study of 20 historical houses in kashan to discover how geometry is used in the architectural design of kashan historical houses. in this regard, the proportions of the area and the yard in these cells have been compared. the result shows that the yard follows the golden ratio as the house design basis. the 1:414 and 1:618 ratios have the highest frequency in the study samples. in addition, in terms of the level of occupation, the courtyard has occupied 20 to 40 percent of the building.