The name of Harun al-Rashid still conjures up visions of the fabulous Orient. But the caliph of the Thousand and One Nights was mere figure of legend. Son of a Yemeni slave who maeuvred him onto the throne after murdering his elder brother, he reigned for nearly a quarter of a century to become the most celebrated caliph of the Abbasid dynasty. Kwn in the West as a cultural patron and as the ruler who sent exotic gifts to Charlemagne, Harun was also a soldier who waged war against the Byzantine empire, and a politician who often dealt ruthlessly with the religious and social revolts which threatened his far-flung kingdom. When the powerful Barmakid family became so rich and influential as to become a state within a state, he exterminated them almost to a man. By protecting and favouring intellectuals, Harun made Baghdad the greatest city in the world, and a brilliant centre of culture and learning. During his reign the Abbasid capital witnessed unprecedented ecomic development, while merchants and navigators carried the caliph's rewn to the farthest corners of the kwn world.