Yusuf Has Hacib (1017-1077). (Kyrgyzstan) Balasagun and Kashgar 11th century. Poet and educator (ethics and medicine in the tradition of Ibn Sina), owner of the oldest work of Turkish-Islamic literature. (Celebrating Bilgi, Kutadgu Bilig) He is the author of Kutadgu Bilig, which gives advice to the rulers and is written on morality. Thanks to Yusuf … Continue reading Yusuf Has Hacip