History of Baghdad
The city of Baghdad (Arabic: بغداد Baġdād) was established by the Abbasid dynasty as its capital in the 8th century, marking a new era in Islamic history after their defeat of the Umayyad Caliphate. It replaced Seleucia-Ctesiphon, a Sasanian capital 35 km southeast of Baghdad, which was virtually abandoned by the end of the 8th century.