ISLAMIC SPAIN The Muslims were the dominant power in Spain for a seven hundred and fifty year period. Articles on key Islamic centers of Cordoba, Seville, and Granada, and the tale of El Cid round out this historical overview of the cultural, literary and social legacy of this rich era.The Muslims were the dominant power in Spain for a seven hundred and fifty year period. Articles on key Islamic centers of Cordoba, Seville, and Granada, and the tale of El Cid round out this historical overview of the cultural, literary and social legacy of this rich era.