The Cadian Club
Deep in the heart of Dis, occupying the top of an interior spire stands a building. It's smaller than most of the institutional headquarters that made up the top tier of the inner spires, but if anything better fortified. A pair of towering statues stand on a great plaza overlooking the outer spires and walls, skyways leading to the other high spires and down into the heart of the city, the great layercake of humanity below.
These statues, currently covered with a layer of scaffolding as they are recoated in silver, depict the generals Drago, and Creed, for this building is the headquarters of the Averneus branch of the Cadian Club.
It is well known around the trust that a significant proportion of Averneus initial colonisation team were of Cadian stock. It is less well known, that due to a mixture of luck and skill the Cadian colonists did better than most of the immigrants, excluding of course the Catachans. The results of this is that a significant number of Cadian born Avernites survive to this day, either retired to the hellworld as a patriarch or matriarch of some large and sprawling Avernite family, or in a position of high honour in the Avernite Military or in one of the civil institutions.
Currently there are 417,000 full members of the Cadian Club, people born on Cadia and another 2,000,000 honourary full members including the governor, a number of high profile avernites and a good number of Avernites mostly or entirely decended from Cadian stock who have proved themselves worthy of the name. These club members have access to the clubhouse, the affortmentioned sprawling luxury complex in dis, as well as kingly treatment at any of the other clubhouses scattered across Averneus.
However, on top of these full members, there are currently 564 million descendent members, Avernites of Cadian descent who are either only somewhat involved with the club, or who are not of high enough status to be granted full membership. These people do not yet have full access to the facilities, but junior membership in the club can still provide contacts and experiences other avernites might take longer to find.
Interestingly, the Cadian Club have recently petitioned the governor for the right to form Cadian Helguard regiments bearing the banners, names, and numbers of the most prestigious regiments involved in the colonisation. These regiments would be created and tithed to the trust guard with the next expansion of the helguard.