In Diablo IV, the Church of the Light is headquartered at the Cathedral of Light.
The Cathedral of Light is a major religious institution in Sanctuary and a prominent part of Diablo IV’s early story. The Church teaches the followers of the angel Inarius, who presents himself as a divine authority to his human devotees. The cathedral’s influence extends through settlements and military forces associated with the faith.
The name can be confused with the cathedral in the original Diablo, which is the dungeon beneath Tristram, or with the Zakarum faith prominent in Diablo II and Diablo III. Diablo IV presents the Cathedral of Light as a distinct organization with its own doctrines, architecture, clergy, and political power.