Gents todays update is the Cathedral of the apocalypse. Also made by the civil engineer of the brotherhood, Flamescreen.
The master initially found out about the doomsday cultists and
furthered their cause to advance his own agenda, circa 2084. They
served as his eyes and ears in all important settlements, but it was
after the discovery of the Bakersfield Vault he saw his efforts
really paying off.
The temple of the Apocalypse built there, served as a vital site of
resources and intelligence gathering.
The temple is a small wonder that enables espionage missions,
but also increases unhappiness as most people do not like Ghouls running around in their midst.