Crux Installation 02

"'This is the Crux of the Ecumene's connection to the domain, where prayer, worship, knowledge, and confirmation was once held... alas, with the great infliction to the domain, this and the other installations will soon degrade again as they are as much the domain as this plane.' ""'Other installations? Again?' ""-Monitor 02A Catalogued Falsity to Spartan Chandler upon gaining access to the Crux installation's control room."

Background
The Crux Installations were religious sites held by the Forerunner Ecumene during their reign over the galaxy Crux sites were used to conduct pilgrimages, meditation, scientific inquiry, and judiciary counsel. Originally where Crux installations now exist were once organic thresholds and access points to the Domain believed to have been used by the Precursors prior to their overthrow at the hands of the Forerunners. With this history lost, the wonders were rediscovered by the Forerunners and embraced as focal points of their belief in the Mantle of Responsibility.

Pre-Firing of the Array
Prior to the firing of the Halo Array the Crux sites were used regularly and similar to holy sites to the Forerunners. Judiciaries most notably frequented the Crux Installations to seek guidance from what was considered a more direct connection to the Domain as it was often noted that the sites emanated a distinct essence which was understood as the presence of the Domain in real-space.

Post-firing of the Array
Following the firing of the array the Crux installations physically degraded due to be deeply bonded with the Domain itself as the Halo Array damages the Domain due to its neurophysical engineered nature. The installations were able to repair themselves by the time of their rediscovery by the UNSC Deliverance in 2559, of Crux Installation 02, however they were once again weltering due to being cut off from the Domain, somehow by choice, following Cortana's rise to power and contact with the Domain.

Theories
Science teams aboard the Deliverance believe the Crux Installations may have severed their connection with the Domain due to Cortana's Created claiming the Mantle as their own. The Crux Installations being a focal point the true knowledge of the Domain may have understood the Domain was being possessed by an entity not worthy of holding the Mantle of Responsibility and thus removed itself from the Domain in order to not allow its information to be privy to the Created.