Stories speak of Jaha, the great crumbling city at the heart of the northern jungles of the Mwangi Expanse — a bewildering array of terraced fortresses and irregular courtyards. This vine-covered, many-terraced wonder-city is said to have been raised from the black earth in an age before humans, or even elves, by unknown beings of great height and singular proportions now long since dead or departed. The crumbling city, which teems with life above silent tombs that predate the Earthfall, is ruled by the paranoid, wildeyed astrologer-remnants of the Lergeni, a people wiped from the face of Golarion by disaster, madness and suicide.
The star-seeking mystics of Lirgen had spoken of Jaha in prophecy and dogma, recognizing the ruin’s importance to the past and the future. After the Eye of Abendego destroyed Lirgen and most of its orthodox theocrats, a rogue faction of Lergeni astrologers led a splinter group of refugees to Jaha. By sword and axe the Lergeni pacified the degenerate, primitive lizardfolk inhabiting the city, before reclaiming the ruined structure from the jungle. The xenophobic, erratic ruling caste of Jaha has of late erected dozens of enormous marker stones throughout the city for an unknown purpose. Sleep is fitful for the people of Jaha, and sights of bizarrely folding, star-cracked vistas hung with sharp-edged spheres haunt the dreams of all who visit here.
Sources: Pathfinder Chronicles Campaign Setting