"Eternal Holy City" Okhema is a safe place for the citizens of Amphoreus in Honkai: Star Rail, and it is unlocked during Trailblaze Mission 'Silver Chariot, Away to that Blackened Land.' One of the Chrysos Heir Aglaea even rewards Trailblazer and Dan Heng their own private bathroom chamber as a thanks for the effort in protecting the holy city.