Investigating Effective Factors on Formation, Development, and Collapse of Ojan Islamic city, according to Comparative Studies on Sources and Archaeological Excavations

Present paper attempts to study, comparatively, urban spaces and archaeological findings of Ojan and Soltanieh in details. Early construction of Ojan dated to 5-6 AH centuries coinciding to Seljuqs, later it was an administration center of Ilkhanids during 7-8 AH centries and flourished until late Safavid period. Firstly, Arqun (683-690 AH) founded Soltanieh, where Soltan Mohammad Khoda Bandeh (703-716 AH) developed and changed it to Ilkhanid capital. Ancient Ojan is among significant Ilkhanid urban centers (summer residence) that located at south of modern Bostan Abad, Eastern Azerbijan, and reconstructed during Kazan Khan Ilkhanid ruler. Matrakçı Nasuh’s miniature of Ojan from Süleymannâme (Book of Suleiman) that illustrate expedition of Suleyman the magnificent from Istanbul to western Iran is among evidences. Present paper attempts to compare urban spaces of Ojan and Soltanieh according to archaeological findings, reasons of construction of Soltanieh relying on preplanning, and documentation of urbanization during Ilkhanid period. the research methodologically based on bibliographic studies and field works. it increases our understanding toward social-political history of urban spaces, architecture, and cultural elements of Ojan and Soltanieh.