Cover Art of Sandman (1989) #50A.
*Haroun al Rashid ruled over Baghdad in the days of wonder. Under him the whole of Arabia flowered and blossomed. But Haroun al Raschid was troubled. He had seen the remnants of cities forgotten. He knew that Baghdad would not last forever. He summoned Dream peremptorily, as one would call a steward, and said: "Please buy my city and preserve it forever in the Dreaming." Dream agreed. He deposited the gleaming spires and the wonders they held into a bottle, leaving behind a Baghdad with no magic - and the tales of the Arabian Nights, so Raschid's Baghdad would never die. *Source: Back of card