The Cuarta Tower, the home of the Cuarta Espada Desmond Doyle, is a more secluded and less noticeable tower when compared to the other 8's, this was more suited for its master. It is also more of a new addition when compared to the age of the other towers, as its position in Las Noches has more reasons than just good scenery. The Tower itself multiple levels above and even more below ground level, guarded by Doyles subordinates the Cautela.
Level 2
The second and top level of the tower houses Doyle's personal quarters. Having everything from a showering, and living room area in the middle. Though overall it has the appearance of something under furnished and uncared for. For in reality it is merely for appearances for it doesn't even have a bed.
Ground Level
The first and ground level of the Cuarta Tower seems more like a entrance hall than a home. Once one walks through the large bay doors, they would probably feel like they are inside of a Dojo, taking more of a traditional Japanese themed floors. Lit by nothing but candles and the light of the artificial sky above.
Below Levels
Hidden beneath the tower lies a much older and fortified structure. Beneath the tower houses a prison structure that was built durring the reign of Aizen and home of the Cautela the Arrancar Stealth Unit. Inside of the prison houses hundreds of holding cells along with many other rooms used for torture and other things. The prisoners themselves are hollows and arrancar that defied Aizen in the former years though were kept alive for specific reasons.
Nicknamed the Hold for it is considered to be much more fortified than Las Noches. The walls lined with sekkiseki stone that make it invisible and impenetrable by sensing or Reiatsu. With the only entrance on the ground level of the tower. Wile knowlege of the prison itself remains a general mystery to even other Espada and as such the presence of any other is forbidden without the consent of Doyle. If there was a intruder there are more than one ways to make the prison not just their own cell but even their tomb. even many of Doyles own subordinates don't know the whole story of the prison and its occupants for most if not all are sealed in their own specific cells.
