From Halopedia, the Halo wiki
Cloister is a hidden shield world installation, built by the Forerunners some time prior to the firing of the Halo Array. During the Fall of High Charity in 2552, a flotilla of San'Shyuum refugees were evacuated from the station by a group including the Prelate Dhas Bhasvod, intending to chart a course for the shield world. By retreating to the shield world, the group intended to have a safe shelter from the firing of the Array, though the death of the Prophet of Truth and subsequent Covenant defeat in the Battle of Installation 00 meant the rings were ultimately never fired. By 2559, whether the flotilla had reached Cloister was unknown to both Bhasvod and Keepers of the One Freedom leader Castor.
List of appearances
- Halo: Divine Wind (First mentioned)