Reliquary

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

Only two known reliquaries 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-colonized 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.

Both the San 'Shyuum homeworld and the Sangheili homeworld of Sanghelios were Reliquaries, with their Forerunner Artifacts jump starting both their religious and technological progress.