Hovering in the hottest areas of the Plane of Fire, the City of Brass sat in an enormous hemisphere of brass some 40 miles across. A curtain of beaten brass surrounded the entire city, stretching for hundreds of miles and giving the city its name. However, since the brass hemisphere gave the city its ability to fly, (albeit slowly,) these impressive walls were typically unmanned. Throughout the cosmopolitan city, the dangerous fire effects of the Elemental Plane of Fire were suppressed by the will of the Grand Sultan in an effort to foster more interplanar trade. Despite this, the city itself had a hindering effect on those of good alignment, due partly to the nature of the efreet but also to the numerous connecting portals with the Nine Hells.

Surrounding the city itself were large tracts, known as the Obsidian Fields, used for the cultivation of the exotic crops that inhabited the plane of fire. Examples included qamah, habbat, verdobba, umbelin, tergamit, and fireweed.There were also areas for slaves to mine tin, copper, and diamonds for their efreeti masters.

Government
The City of Brass was governed by the undisputed Sultan of the Efreet, who ruled the city with a tyrannical hold over his subjects. On occasion, the Sultan would oversee important legal matters of noble efreet but mostly focused on wider policies. Although the Sultan was the paramount authority in the City of Brass, he generally delegated the day-to-day affairs to his vizier.

Most efreet pledged their fealty to the Grand Sultan, whether they resided in the city or not. Even those residing in settlements outside of the city considered it their capital.

Law & Order
Although the streets of the city were bustling with trade and crammed with crowds during the day, by night a strict curfew was enforced by the Illuminated. All shops were shut up and all citizens returned to their homes, else they faced arrest, the loss of a hand, or even death.
Slaves were obligated to bear bracelets that displayed their servitude and who their master was at all times. It was common for visitors to the city to become slaves by defaulting on borrowed money. In addition, this servitude could be extended by additional offenses that could add days or even years to their thralldom.

Trade
The City of Brass was a shining beacon for trade and commerce throughout the planes, beckoning many planar travelers to its bazaars, souks, slave markets, and metalcrafters. Famed for its vendors of smoke, incense, and tobacco, the city was also noted for the azer smiths who worked ceaselessly for the efreet, crafting arms for the armies and the sultan. The city’s harbor became a hub of activity when the City of Brass was set down near the surface to take on slaves and goods. This was done only by the Sultan’s decree but could allow vast amounts of food and goods to flood into the city.

Defenses
Arguably the city’s first notable defense was its uncanny ability to float above and away from most threats. However, the city was still susceptible to flying intruders crossing its walls. The guards did not take such attempts lightly.
The armed forces of the City of Brass dwarfed the largest armies of Faerûn and came in a bizarre array of legions.