City of Brass Floating amid the Elemental Plane of Fire , the City of Brass was the epicenter of efreet culture and was the place from where the Sultan of the Efreet ruled . Geography . Hovering in the hottest areas of the Plane of Fire , the City of Brass sat in an enormous hemisphere of brass some 40 miles ( 64 kilometers ) 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 , and tergamit . There were also areas for slaves to mine tin , copper , and diamond s 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 . Around 1367 DR , the title of Grand Sultan was held by Marrake al - Sidan al - Hariq ben Lazan . 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 . For matters regarding the Prime Material Plane , the Sultan delegated to his six Great Pashas . 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 . Behind closed doors , the efreet of the City of Brass had trade links with the Baatezu . Numerous portals to the Nine Hells allowed frequent trade of slaves and information . 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 . These legions and their numbers follow : In addition to these considerable forces , a colossal navy of 18 , 000 individuals crewed the Sultan ' s personal fleet . History . Considered the " oldest city in all creation " , the City of Brass has long been known as hub for planar travelers and trade . Over the years the City of Brass was subjected to a number of attacks from outsiders . One notable occasion was when an archmage by the name of Tzunk attempted to conquer the City of Brass with the help of the potent artifact , the " Codex of Infinite Planes " . Even with the powerful tome , he could not best the four million efreet that protected the city and was eventually defeated and bound before the Sultan . At some point , the frost giant Kostchtchie led an attack on the City of Brass in a devastating raid . By traveling aboard the flying Ark of Kwalish , he and his followers caused much chaos . Rumors & Legends . Plots and rumors abounded in the City of Brass , and a large degree of that concerned the efreet , if only for their numbers . Reputedly , the Sultan ' s court trafficked with baatezu from time to time , though much of these secret dealings happened behind closed curtains and only added to the tyranny of efreet rule . Layout . Throughout the city the common efreet and their slaves had their own houses . The houses of noble efreet , on the other hand , teemed with servants and easily doubled as small fortresses . The City of Brass was illuminated primarily by the ambient light from the Sea of Fire and fiery canals that intercrossed the city and provided a dim red glow throughout . This was supplemented by intermittent pots of unquenchable elemental fire that hung along the streets . The Furnace . This was the core of the city and where the Charcoal Palace of the Sultan resided . The other districts of the city surrounded the Furnace in ever widening circles . Avencina . Cracked and rocky ground marked this area clearly for the slums it was . Keffinspires . The gilded towers of the azer , connected by numerous high - flying walkways , made this quarter their home . Ashlarks . Many efreet commoners resided in this district , and even noble efreet made their way here if they were keen on slumming it . Rookery . This quarter was infamous for being a hive of illicit and treacherous activities , so much so that even the Sultan ' s men were fearful of setting foot there . Rife with gambling dens and pit fights , it accommodated a lot of firenewt s . Pyraculum . Within the Pyraculum district was the city ' s market , which attracted countless craftsmen . Marlgate . Next to Pyraculum lay Marlgate , a warehouse district which only catered to dao merchants and vermin . Iskalat . In this district were the public docks , primarily used for interplanar vessels . It was a lively district with a multitude of races from across the planes and was dotted with inns and taverns . The Foundry . The Foundry was comprised of wide streets , plazas , and the homes of the most powerful and affluent efreet in the city . Glory Mine . Nestled in the very rock of the city , this was the domain of the salamanders . Without a salamander guide , the warren was virtually impassable . The Plume . The Plume was a quarter with streets of small shops , coffee houses , and stalls , which welcomed visiting merchants and dao to its exemplary accommodation . The Char . Walled off from the rest of the city , the Char was where the slaves of the Sultan and his nobles lived . Slave barracks and tenements served as housing , while smelters , smithies , and shops were where the slaves plied their trades . Castings . Home to the efreet army that stayed within the cavernous barracks , the Castings was a district of frequent skirmishes and duels . Cindersweeps . Here the navy of the Sultan was stationed . Arches . Near to the naval yards and within the shadow of the city ' s hills was this staging area for receiving slaves .