The Mirror of Pleroma (also the Obsidian Mirror of the Castle of the Prism, or the Lighthouse of the Pleroma) is an ancient artifact in an interior room at the heart of the Castle of the Prism.
It is a large obsidian disc in a carved stone frame with runic seals. Instead of the observer’s reflection, the glass shows a golden dawn over a distant sea: the lighthouse of the Pleroma, the place from which divine light emerges before spilling outward.
Three initiates kneel before it in a triangular arrangement, in white, black and gray habits. The mirror operates under the jurisdiction of Pope Alexander VI.
See also
Spanish entry: El Espejo de Pleroma