That would be famous CALIPH HARUN AL-RASHID, who founded the Beit al-Hikma or House of Wisdom, one of the largest libraries in Pre-Modern Times.
Abbasid Caliphate.
An Abbasid is a member of the dynasty of caliphs which ruled from Baghdad from around 750 to 1250, claiming ancestry of Abbas.
The Abbasids
The first Caliph Abou Bakr, then Omar. then Othman, then Aly
they ruled by a leader who did not like them
The last Abbasid caliph was Al-Mustakfi Billah, who ruled from 1517 until the fall of the Abbasid Caliphate after the Ottoman conquest of Baghdad. Following this event, the Abbasid title continued in a nominal sense under Ottoman protection, but the political power of the caliphate effectively ended. The Abbasid lineage persists in a cultural and historical context, but Al-Mustakfi is generally recognized as the final caliph of the Abbasid dynasty.
Ruled means you were the leader or ruler. It would be the land you ruled.
whendid zimbabwe gain independence which party has ruled since and whose its leader
Iran is ruled by an ayatollah, who is the supreme leader of the country.
Hitler ruled as leader of the Nazi Party of Germany.
Vladimir Lenin is the communist leader who ruled Russia immediately after World War 1.
Rome