Caliph Harun al-Rashid (763/766 ??809); the fifth Abbasid Caliph; hero of many of the stories in the Arabian Nights; in Arabic literature figures in many anecdotes; one of the best known being his wandering incognito at night through the city to learn the truth about his subjects and their lives; from a series of Liebig promotional cards showing sovereigns mixing with their people; Souverains parmi le peuple;