Organisations

Seniority

The Rumblers

Three crime families are the three subfactions.
Subfaction membership is compulsory.
The Columna, led by Count Columna, are nobles who lost their lands in the War and turned to crime.
The Daynann, led by Raymond Daynann, are a veteran Horizon crime family.
The Kellor, with no single leader at present, were immigrants at the end of the war.
The families seek to make the underworld of Horizon responsible and controllable (ie under their control).
Honour and the family are everything.
The alliance between the families is fragile

The Beggars are a mob of Horizon.
All career beggars in the city must be members.
Specialise in information gathering/trading.
Honour the Mutilated One.
Are ruled by the King of Beggars, who is periodically possessed by the Mutilated One.
Subfactions are informal fraternities, subfaction membership is noncompulsory.
No one district, but strong in the underground (sewers, catacombs, subway) and the Ruins.

Want to return to the good old days of the Empire.
Are too intelligent just to declare independence and get Horizon crushed.
Instead they plan to cause disaster in one of the Four Nations and have Horizon annex it, and grow to be sufficiently powerful that it's equal to the other three.

Former group of fanatic followers of the Toolmaker, plus rogue steamworkers and clockworkers
Built a machine capable of capturing and enslaving a God: the Citadel of Steam, situated in Irgar.
Unknown to them, the god they have in there is the Intercessor.
The machine gives them the power to perform Grey Magic.
Various degrees of membership: Servants (do odd-jobs), Agents (do odd jobs but with more autonomy), Adepts (command a cell of Agents), Engineers (workers in the Citadel of Steam, don't know there's a god in there), Commanders (orchestrate strategy), High Engineers (workers in the Citadel of steam, do stuff that the Engineers can't be trusted to know about)

Originally founded by the Emperor; now funded by the Guilds of Horizon.
Like Horizon itself, survives because everyone benefits from using it and because the balance of power means it can assert its independence.
Run by a Chancellor and a committee of professors.
Departments are: Faculty of Mechanomancy, Faculty of History, Academy of Military Arts, Faculty of Alchemy, Central Administration (which is rumoured to contain Corobodos, the Paperwork Man)