Lunarium

The Lunarium is the silvery counterpart to the Solarium. It serves as the gods' compendium of knowledge as well as a vault for their many artifacts of power. Sif Muna the Lorekeeper looks after the Lunarium and thwarts the many attempts to breach its walls by conniving burglars. It produces no light on its own, but nonetheless the light from the Solarium shines so brightly that is reflects off the Lunarium's surface, forming what mortals call the Moon.