Dark Sun: The Scorched World of Athas
The caravan district is the primary trade and visitor’s district in Tyr. Regular visitors and dune traders enter the city-state through the massive Caravan Gate. The area just inside the gate is a confusion of animal pens, transports, crates of exotic goods packed for travel, and traders screaming about their loads. The gate is usually watched by a Tyrian Guard that questions newcomers and collects taxes from merchants (about 5 percent of the declared value of a wagon of trade goods). The Guard records the names of foreign visitors and their purpose in coming to the city.