The city and it's formation mechanism, components, in the ancient iran

From ancient times several reasons have caused to format a city. The reasons such as climate geographical location and fertility of region، are perhaps of the main reasons for gathering of people in a region and the formation of a city. Accordingly، theurbanisation and it''s formatin in Iran''s history can be contemplate. Hence، the authors، based on the historical methods and relying on the sources، have tried to review creation of the city and formation of it the anciet times، accordingly، findings of the city، components of it and it''s effects on various factors، such as geographical conditions، religions، beliefs، military، commerce، political and governmental factors can be show، however، various reasons are important in the urbanisation.