Criterion (iii): Samarra is the finest preserved example of the architecture and city planning of the Abbasid Caliphate, extending from Tunisia to Central Asia, and one of the world's great powers of ...

Inside the Abbasid palace of Baghdad, built in around 12th century. The caliphates (Islamic states) were governed by a caliph. They were the successors to Muhammad. The first major caliphate was ...