The Monastic Precinct (Library Subsector) is a set of several rooms that appears to lie inside the Labyrinth but apart from its central sector.
- Rooms: a main room for negotiations, an antechamber for investigation, and a passage (possibly for service). A small “parallel room” (cuartito paralelo) is where Ariadna was placed.
- Guard: the doors are guarded and barred, with guards bearing blue crosses.