The Radiant Assembly is the pantheon of Imperion, the gods who stand for the empire's values: war balanced with wisdom, community and civilization, and respect for nature and the divine order. Worship runs to grand temples and public ritual, and the faithful hold that the gods take an active hand in the fate of the empire and its people.

By its founding myth, the Assembly began when Achillan rose to godhood and called the other gods to council, a divine order that mirrors Imperion's own Senate. Worship centers on the Grand Temple of the Radiant Assembly in Sanctuary Square, Altoria, where the hall is divided into shrines for each god. Public rituals and grand festivals mark the year, chief among them the annual ceremony at the Eternal Flame of Valor, lit by Aurelios, honoring the empire's fallen heroes. The great noble houses keep their own devotions: House Cassian to the faith itself, House Valens to martial duty, and House Aurelia to commerce and diplomacy.