Nighttown is a fictional place featured in the novel Ulysses by James Joyce. It represents a dark, chaotic underworld of Dublin, where characters explore themes of desire, morality, and identity. The setting is known for its vibrant nightlife, filled with bars, brothels, and various characters that embody the city's complexities. In Ulysses, Nighttown serves as a backdrop for the character Leopold Bloom's journey, particularly in the "Circe" episode. This part of the story is marked by surreal events and hallucinations, reflecting Bloom's inner struggles and societal issues. The episode highlights the contrast between reality and fantasy, making Nighttown a significant element in the narrative.