6 holdings are shelved on this floor. A shared floor records where volumes sit and nothing about what any of them says; these are neighbours, not relations.

• MS 1878.29 Bureau of Classification and Nomenclature
• MS 6004.25 Catalytic Referentiality

  Catalytic Referentiality is the property by which a subject catalogued in the Tower causes further subjects to be spoken of, and therefore t…

• MS 3005.33 Spire 91

  Spire 91 is an aperture-class architectural spire located on Floor 4,307, designated under the protocols of Spire Annex 7. Its primary docum…

• MS 4363.54 The Basement of Unspoken Conclusions

  The Basement of Unspoken Conclusions is an administrative and archival floor of the Tower, officially designated Sub-level Alpha-Ω. It is th…

• MS 4014.31 Vaults of Calcined Silence
• MS 1674.01 Visitor Ordinance of the Closed Systems