Al-Rashid - Abbasid Caliph - died in 1136.
Az-Zahir - Abbasid caliph - died in 1226.
Al-Rashid - Abbasid Caliph - was born in 1109.
Az-Zahir - Abbasid caliph - was born in 1176.
The second caliph is Abu Jafar :)
The Abbasid Caliph Abu Jaafar al-Mansour.
Al-Saffah [721-754] was the first Abbasid caliph. His capital city was Harran, Şanlıurfa Province, southeast Turkey. Al-Saffah ['The Slaughterer' in Arabic] was caliph from 750 to 754. He died from smallpox on June 10, 754.
Vizier
The first Caliph Abou Bakr, then Omar. then Othman, then Aly
The city of Samarra was founded by the Abbasid caliph al-Mu'tasim in 836 CE. He chose Samarra as the new capital of the Abbasid Caliphate due to its strategic location and to escape the political and social unrest in Baghdad.
Hulagu Khan of the Mongols defeated Abbasid Caliph Al-Musta'sim in 1258 in Baghdad. He completely conquered the Abbassid Empire and made sure to raze every city to the ground that gave him one iota of resistance.
The Muslim Empire established by second Rashidoon Caliph Hazrat Umar RAU, the Ummayad Caliphate, The Abbasid Caliphate in Baghdad, and the Ummayad Caliphate in Spain
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.