The history of Persian libraries in Mongol time is still a relatively unknown field of research and has been the subject of much study. This article,
express the view that, in this period there were three Royal libraries: one in Maraghah and two others in Tabriz, that is shumb Ghazan library and
Rashidyah library. In this period, library had two functions: production of manuscripts and art books. This article discusses two functions of Mongol
libraries from various source