Reliquary

A Religuary is the Covenant term for a planet that holds a tremendous number of Forerunner artifacts.

Only two known reliquary's are known. The first was likely the planet where the Sangheili and San 'Shyuum encountered each other, a world in Sangheili territory with Forerunner relics. The second was the human-colonised world of Harvest, which was glassed by the Covenant believing the humans had destroyed or stolen the relics present, leading to the Human-Covenant War.

The Sangheili homeworld of Sanghelios was a Reliquary, having it's Forerunner Artifacts start their religion and giving them a quick rise in the Technology Tiers.