Baghdad, the capital of the Abbasides, was founded by their second Khalif, Al-Mansur, in A.D. 760, finished in four years, and raised to a high degree of splendour by Harun-ar-Rashid. Originally it was considered only as a great strategic point, and its garrisons were to keep the surrounding country in subjection. Eventually it became the centre of learning and civilization, and an Arab author wrote of it as follows: 'Baghdad is certainly the capital of the world, and the mine of every excellence. It is the city whose inhabitants have always been the first to unfurl the banners of knowledge, and to raise the standard of science; indeed, their subtlety in all branches of learning, their gentle manners and amiable disposition, noble bearing, acuteness, wit, penetration and talent are deservedly praised.' Baghdad, at the beginning of the ninth century of the Christian era, was the centre of all that was grand and brilliant in the Muhammadan world. Art and commerce, literature and science, were cultivated to a high degree, and the luxury and extravagance of court life exceeded almost the imagination of temperate European minds. Everything curious, romantic and wonderful, narrated in the 'Nights' is connected with Harun-ar-Rashid's name, or supposed to have happened in his reign. Thus, his vizier, Jaafar, the Barmekide, the superintendent of his harem, Mesrur, and his spouse, Zobeida, were first made known to novel-readers, and their importance as historical personages were duly appreciated afterwards, when Erpenius, Pococke, Herbelot, and Reiske elucidated the history of the Khalifate by translating the works of the Arab chroniclers Abul-Faraj, Al-Makin, and Abul-feda. Later on still further information was made public about the translations made from Greek and Syriac into Arabic during his reign, as also concerning his position, not only as a lover of tales, but as a promoter of jurisprudence, a patron of the medical and mathematical sciences, and a builder of magnificent and useful edifices. His court was also well attended by poets and singers.