A survey on evolution of architecture of Bayazid Bastami's complex,, With emphasis on the Ilkhanid era

Complex of Bayazid Bastami located in Bastam city, Semnan province, is one of the examples of religious architecture in Iran in the Ilkhanate era. Due to the existence of the tomb of the famous mystic, Bayazid Bastami (161-234 AH), this complex has been considered by various governments and kings since the early Islamic period and many constructions have taken place in different periods - from Buids to Qajar eras. Most of the buildings of this complex and also the restorations are related to the Ilkhanid era and especially the period of Sultan Mahmud Ghazan Khan (694-703 AH) and Sultan Mohammad Khodabandeh Al-Jaitu (703-716 AH). Al-Jaitu, because of his devotion to Bayazid, even chose the names of some of his children from the names and titles of Bayazid - Bastam, Bayazid and Tayfur. In this paper, it has been tried to study and analyze the major Ilkhanid buildings of the complex. The research method in this paper is descriptive-analytical and the data of this paper have been collected through documentary studies and field studies with a theoretical approach to cultural history studies.