Abdurrahim Karahisārī (d. between 1483-94) who was among the leading disciples of Akşemseddīn (d. 1459) initiated to his master in Beypazarı/Ankara circa 1436 and spent a long time together with him during his travels through Edirne, İstanbul, İznik and Göynük. Karahisārī represented the Şemsiyye branch of Bayramiyye which is opened by Akşemseddīn and continued by prominent sūfīs such as İbrahim Tennūrī (d. 1482), Sheikh Yavsī (d. 1514), İlyas Saruhānī (d. 1559-60) and Bolulu Himmet (d. 1684) in Afyonkarahisar sanjak of the Ottoman state in the fifteenth century. He authored four books included a Turkish translation in verse of Būsīrī’s (d. ca. 1296) Qasīda al-Burda, an extended Turkish translation of Hāssī’s (d. 1237) who was a disciple of the founder of the Kubrawiyya order, i.e. Najmuddin Kubra (d. 1221), al-Salwa fī sharāit al-halwa, called Munya al-abrār wa gunya al-akhyār, an epistle entitled Risāla fī ashrāt al-sā‘a which can be read within the context of the doomsday debates of the day and Vahdetnāme which is a mathnawī composed of 4267 verses on various topics of the Sūfism. In this study, new findings and remarks on Karahisārī’s life and intellectual heritage will be introduced and interpreted. Essential outcomes of this study can be summed up as that Karahisārī was at a crucial position before Akşemseddin, he was always beside his sheikh during his relations with the state elites, he was also in an important position before the governing elites since Murad II till Bayezid II; and Karahisārī left İstanbul after the conquest with Akşemseddin for scientific and spiritual reasons; and lastly he played a vital role in the formation of Bayramiyya and vernacularization of the Sūfism in Anatolia.