A large circular preservation chamber located beneath the western vault complex. The chamber predates the surrounding archive architecture and contains concentric preservation arrays broken containment structures and extensive geometric sealwork. Recent investigation confirmed the chamber housed a large unidentified preservation-dependent entity now designated the Sigil Warden. Significant damage was present throughout the structure including fractured sigils destroyed pillars broken chains and failed containment spirals. During restoration activity dormant preservation systems reactivated throughout the chamber resulting in widespread geometric illumination and autonomous seal reconstruction. Evidence suggests the location was designed as a sanctuary and stabilization environment rather than a prison. The chamber now appears partially restored though numerous systems remain incompletely understood. Further investigation required.