Analysis of information sources in references of the Wikipedia article "Ziryab" in English language version.
The most influential courtier was the musician Ziryab, a Persian, who had held high position in the court at Baghdad
(...) in the career of Abū al-Ḥassan ʿAlī ibn Nafayni (known as Ziryāb), a 9th-c. ce Iranian polymath who, arriving in Córdoba, used the prestige of his origins to set the court fashions in poetry, music, and manners in accordance with those of Baghdad.
