'So that's another reason why the Underworld Emporium is so peaceful. Residents of various tiers can be found in the Emporium.'
Apart from the aesthetic and various activities which could be performed in the Underworld Emporium, there was another reason why the Underworld Emporium was regarded as one of the masterpieces of the Underworld- Peace.
There were very few places in the Underworld where one could find peace and did not have to constantly be on the lookout for any sign of danger. Killing, violence, stealing, raping, kidnapping, and all sorts of evil are the norm of the Underworld.
Finding something like peace, law, order, or whatever that was the opposite of evil, was like a fantasy, a dream, a delusion, and for most people… a wish.
But surprisingly and shockingly, the Underworld had a few places where one could rest and find peace. A place where even the weak could find peace… but not the poor.