The identity of Cyrus the Great in Sassanids historiography; Some figures with this name in the borders of Eranshahr

Following the content of Pahlavi texts (Middle Persian) and the reflection of their information heritage in the historiography of the Islamic period, today there is a consensus that at least since the Sassanid era to the era of modern studies, Cyrus II was not known to the Sassanid court and society, In such a way that his historical identity is described according to archeological documents and written sources. Whether this was due to the natural flow of time and the loss of the ability to read previous lines or the loss of written data, or a coercive decision, is one of the debates of the leading article. This research first examines the possible and documented next developments of the previous historical information to the Sassanid period and then, within this analysis, what signs of knowledge and lack of knowledge can be traced from Cyrus II to the Sassanid era. In this article, it was seen that around the western borders of the Sassanid Empire, it was possible to have a documentary knowledge of the identity of Cyrus in its historical form. Why and how some of the historical information related to the Achaemenid period, and especially the era of Cyrus II, was excluded from court historiography in the early Sassanid era is the basis of a leading study.