With the establishment of the Abbasid dynasty, a new epoch in Arabian poetry began.
The Arab city, the old or round city of Bagdad, was founded by the caliph Mansur of the Abbasid dynasty on the west side of the Tigris just north of the Isa canal in A.D.
917," in Journal Royal Asiatic Society, 1895, 1897; Baghdad under the Abbasid Caliphate (1901).
The first explorer to enter the sacred Hejaz with a definite scientific object was the Spaniard, Badia y aeblich, who, under the name of Ali Bey and claiming to be the last representative of the Abbasid Caliphs, arrived at Jidda in 1807, and performed the pilgrimage to Mecca.
The ruling dynasty of Julanda in their capital Suhar lasted on till the Abbasid period.