Los Angeles vault

The Los Angeles Vault was a demonstration Vault built by Vault-Tec to advertise its series of fallout shelters. As such, it was not part of the Vault Experiment and was never assigned a number. When the Great War started, many people took shelter in this Vault, and eventually emerged in 2092, founding the Boneyard.

In 2155, the Master learned the location of the Boneyard Vault. He conquered the inhabitants and set up operations there, and the human cultists began to use the Vault as their powerbase. Eventually, a monumental buidling known as the Cathedral was constructed above the Vault. The Cultists thus became known as the Children of the Cathedral.