There is no reason to visit the haunted streets of this arctic city-state on a whim. You can earn a living here through fishing, mining, or civil service, but few see an appeal in its narrow subterranean quarters and months without sunlight.
The Vadakendanic Procession summoned Tyrn Cha eight millenia ago, as part of their spread across the AmunAlden continent. It has changed hands and languages several times throughout history, and for the last eighteen centuries has existed as a socialist republic spiritually guided by the Convent of the Maiden's Oracle, whose temple encapsulates the stronghold's heart.
The living stronghold has carved itself into the foot of Mt. Alden -- first as a ziggurat and later tunneling down into the subnivean to accomodate agriculture and later towards the core of the mountain and the heat of its magma chambers.
Its population is predominantly Faecha and Nasyk, whose descendants were deported here during both Vadakendanic and Valuser'ran apartheids. They are not the only people you'll encounter in Tyrn Cha:
Aspirants come to commune with the gods interred within, and to train their Divine Eye and Breathless Voice with the venerated seers of the convent.
Historians come to peel back the layers of history. Its walls carve themselves with stories and murals of those who have lived within the city. Eight millennia of rises and falls, tragedies and wonders.
Exorcists come to study the Soul Cycle of the city and the thaumaturgy which animates it.
Monoliths pass through on their way up the mountain -- usually to either be buried or visit a burial.
Anglers come here to work at the subnivean fisheries and in the Fossil Sea
Miners come here to extract gold and silver from the mines within Tyrn Cha and peppered up the side of the mountain.
Citizens are granted a living space and the aid of the resident phantoms.
Entering Tyrn Cha requires a Pact ID and a citizen who vouches to be your guarantor.
Phantoms avoid non-citizens, giving them several meters of berth. This can be inconvenient in places where phantoms are doing lots of work.
Becoming a citizen requires serving five consecutive Night Shifts, at which point you will be given the Citizen Sigil during the First Dawn ceremony.
Phantoms build furniture and the structure, as well as cleaning and maintaining facilities. They can also be asked to find a missing person or dear object, as well as guiding you to parts of the city.

Very cool. I love the history of the city