It was adopted as the main royal holiday during the Abbasid period.

One of the most common forms of literature during the Abbasid period was the compilation.

It continued to be a place of much importance throughout the Abbasid period.

In the Abbasid period the region was under the independent rule of the Hamdanids.

Many people did not like his son and therefore the books written during the Abbasid period also portrayed him in the same light.

The Abbasid period saw initial expansion and the capture of Crete (840).

This department survived till the middle of the Abbasid period.

It was not until the Abbasid period and the foundation of Baghdad that Iraq would regain its prominence.

The scientific revolution of the Abbasid period involved its participants in more than an acquisition of new information.

This may be explained by construction of underground cisterns in the Abbasid period, causing the original structure to be narrowed.