It might be about survival. The 'black city' could be a harsh environment where characters have to struggle to survive, either against other inhabitants or the difficult conditions of the city.
The main theme could be about mystery. In many short stories set in a 'black city', mystery often prevails as the setting itself is rather gloomy and can hide many secrets.
Well, it might be about self - discovery. The silence in the city could force the characters to look inward. Without the distractions of a noisy world, they have to confront their true selves, face their fears and desires, which is a common theme in many short stories.
Another possible theme is community. The city of refuge would need to have a sense of community for it to function as a place of safety. People within the city might support each other, share resources, and together create a haven. This could show how in difficult times, a community can be a powerful force for survival and growth.
The main theme could be about self - discovery. In the story, the character might be lost in the physical city but also in a more metaphorical sense, like losing their sense of purpose or identity.
The main theme could be the spiritual essence of the city. Since it's a city of churches, the overarching theme might revolve around faith, devotion, and the role of religion in the urban environment.
Since I have no knowledge of 'the black chat short story', I can't be certain about its main theme. It could be a story that uses 'black' to represent a negative emotion or situation, and the chats in the story could be centered around that. For example, if it's about a group of people in a difficult situation sharing their thoughts through chats, and the 'black' could be a metaphor for their hardships.
The main theme could be the struggle between reality and illusion. The black monk might represent something that blurs the line between what's real and what's not in the protagonist's mind.
The main theme is often related to the power of the imagination and its impact on a person's perception of reality. The protagonist's hallucinations of the black monk show how his mind can create something that blurs the line between the real and the imagined.
The main theme could be about the mystery of the black dog. Maybe it represents something unknown or a symbol of fear.
Well, I think the theme is about kindness and cruelty. Black Beauty encounters both kind and cruel humans. For example, some owners take good care of him while others overwork and mistreat him. This contrast reflects on the theme of how kindness can make a big difference in an animal's life compared to cruelty.
As I don't have access to the 'the black ghosts short story', I can only guess at the main theme. It might be centered around the black ghosts as symbols. For example, they could symbolize the dark side of human nature or some hidden danger in the story's setting. Or perhaps it's about the search for the truth behind these black ghosts, which could imply a theme of discovery and revelation.