Beic cities tend to sprawl, with incorporated agricultural areas; the city covers almost the entire delta area, though the southern delta is part of the city of Kêkè. The zone of densest settlement, Ŋánjùs, enclosed by enormous walls, consists of the dock area, the nearby markets, shipyards, military factories (specializing in steel and gunpowder), and extensive royal offices, including the Béjan, the legislature. The queen, currently Líŋhír, lives in a fortress (the Nànnèn) on an island dominating the harbor.
Somewhat to the southwest is the School Quarter (Łójùs), featuring a number of schools and monasteries, including an academy created to study the science of Ereláe. To the southeast is the Craft Quarter (Nârjùs) which includes both traditional workshops and modern factories. And south of this is the Jǔŋjùs, the Gang Quarter, which as its name suggests is the domain of the city’s powerful criminal organizations, also (not coincidentally) its pleasure district, with an extensive selection of male and female prostitutes, taverns, and performance venues. Finally the Unsunlit Quarter (Mǎsdɛjùs) west of this is a poor neighborhood, named for the darkness of its narrow streets.
The rich delta allowed dense settlement once agriculture was developed in the Bé, sometime after -1000. Our records of the city itself go back to about 1450, when it had emerged as a city-state controlling the delta (but smaller than the cities along the Lɛn and Čú to the south).
During the 1500s the city engaged in regular warfare with the other Beic kingdoms. In 1556 it defeated Pànsàɔ, capturing the cities of Kêkè and Sîpó— but a generation later, in 1588, these cities created their own kingdom— Lésàɔ, which has given its name to the Lé ethnicity. Its capital was Sîpó.
The Lé queen Sɔnjɔs undertook a bold attack on Jansɛ̀ in 1595. She feinted with an attack from the west designed to suggest an invasion from Dásnâr. When the Jansenes sent their army west, Sɔnjɔs moved against Jansɛ̀ itself, combining a marine invasion from the docks to the north with a land incursion from the east. The city was incorporated into the growing Lé empire.
Unexpectedly, the city was lost again in 1690, to an invasion by ktuvoks. Under the domination of the ktuvoks and using ktuvok military technology such as crossbows, improved metallurgy and better fortification, the Jansenes spearheaded the conquest of Kêkè and Ŋêsɛ̀— but at the same time, the conquered Lé secretly taught the other side their new techniques. The Lé also acquired elcari and iliu allies; a military coup also led to the establishment of the Men's Empire. Jansɛ̀ was reconquered in 1715 and the ktuvoks entirely defeated four years later.
The Men's Empire devolved into civil war after an unsuccessful invasion of Mɔłɔsɔu. The city fell under the domination of the nihilistic cult of Ká, based in the Ŋě valley to the west. The merchants of Jansɛ̀, oppressed by the cult as well as by the great power of local gangsters, organized an alliance with Pànsàɔ which destroyed the temple complex of Kâ (2261). This led to a Béjan or Great Council which declared a new nation, Belesao, with its capital in Kêkè.
A new civil war broke out in the 3020s, based on the resentment of upriver landowners against the mercantile, urbanized river and littoral zones. Jansɛ̀ declared its neutrality and, once the two sides had fought themselves out, mediated a treaty. It now became the capital of Belesao (3075).
The city has embassies of both Kebri and Verduria. Ereláean ships are not allowed to sail up the Lɛn, and are subject to confiscation if they attempt to do so; this has allowed Belesao to control the trade in tea with the interior— barely, as smuggling is rampant.