First, let me explain a bit..
Ragnos Cathedral is a separate entity from Alabrek Castle. Alabrek Castle is built around the Cathedral. We'll get to Alabrek Castle down the road.
I've drawn a basic design of Ragnos Cathedral, to scale. The designs aren't pretty, they're more like blueprints. Hopefully I'll get a graphical genius to make better looking stuff once we have final designs. Before I advance to individual floor plans, I wanted to give everyone a chance to give their input of what should be inside the cathedral.
Things to keep in mind, this is the Capital Building of Tarthos. The government is here. It's also the home of the Disciples of Ragnos. There will be quarters available for house members in the cathedral, but it's not your primary residence.
http://dbmember.com/derev/ragnos_cathedral.jpg <-- theres the first image, so take a look. note the building is square and would look the same from all four sides.
There is no main hangar in the cathedral, there is a private hangar in Alabrek Castle for our use. Heres a floor by floor breakdown of how I envision this..bare in mind were looking at 1.8 million square feet, this is HUGE.
Level 19 and 20
Governor's (Quaestor) Quarters
Reception Area / Meeting Area
Private Hangar (secured for QUAs use as well as visiting VIPs..capacity of just 3-4 fighter sized craft)
Level 16, 17, 18
Private Quarters and Office of the Aedile and House Overlord
Meeting & Reception Areas
VIP Quarters (House Members)
Bars, Restaurants, Etc
Temple of Ragnos (Disciples of Ragnos)
-----Level 9 and Above are highly restricted access-----
Barrack Housing (DSOG Detatchment)
Entertainment, Bars, Restaurants
Office Space / Planetary Functions / House Members
Meditation Garndens, Reception Area, Official Government Officers, Conferences Rooms, House Museum, Ect
Training Areas, Gym, Recc. Area
----Sublevels B2-B4 Are highly restricted access----
Sublevel Access Control
Emergency Operations Center
Tunnel System Access Control
So..comment, suggest, ect!
Well, my big suggestion involves the Library. The Dark Library, by my understanding, is huge. It contains an incredible amount of data both about the Force and all other subjects. Even with as large as each floor would be, it ought to be more than one level. Since you don't know what would be on level 9, I'd suggest moving 10 down, and making 10 and 11 both the library. Especially since the Library would also contain at least a few conference rooms, private terminals (ie: offices which require enclosed spaces) a place for the droid curators to recharge, etc. Two levels just makes more sense.
I was under the impression that the Alabrek Castle and the Ragnos Cathedral were in the same as it was originally built by Sith Lord Urias Orian. We just restored it, repaired it and exanded it a bit. It would be more old looking the deeper you go into it but from the outside it looks like a shining modern building. HMR merely renamed the Alabrek Castle to the Ragnos Cathedral when they settled on Tarthos... that is how it reads on the wikipage. I think its like the new Alabrek Castle was built around the old Alabrek Castle... meh, where is Malisane when you need him, heheh.
The layout looks ace and I like structure of the levels looks good.