source by many experts), as well as Ata al-Mulk Juvayni 's famous Tarikh-i Jahangushay-i Juvaini (which spans the Mongolid and Ilkhanid era of Iran ). Attar 's Tadkhirat al-Awliya ("Biographies of the Saints") is also a detailed account of Sufi mystics, which is referenced by many subsequent authors and considered a