okay, then, now I have time to go thoroughly through your replies.
Are we looking at a hangar bay, or the courtyard of a roman villa? In one of those pics, I think we even have a wine rack. Where are the overhead catwalks, the gear cranes? Why is the ceiling so high? Where are the safety rails, and the floor markings and the like? Are we storing ships in the hangar, or is there a seperate hold for them? If so, where is the access for that hold or the elevator for it? Is this a launch hangar, or a repair bay? If its a launch hangar, where are the back blast shields? If its a repair bay, why is it exposed to the exterior of the outter hull of the ship like a hangar? Why is the hull around the hangar door paper thin? Do they not armor the area? The distance from the inner wall of the hangar to the outer surface of the ship is likely going to be more than a few inches (more like several meters). These are just things to keep in mind when you're designing things like this.
To answer your questions, this looks like the courtyard of a roman villa, because, well, this is supposed to look like the courtyard of a roman villa. The TPX Caesar is the Nodewar equivalent of the White House, or Kreml, or whatever the presidential palace of your country is. It is supposed to be impressive.
As a purpose, this is the guest hangar. Diplomatic ships, transports, etc. stay here on the big, yet undetailed floor as long as the people onboard do whatever they are here to do. The apollo hangars in the back wall are there because it can convienently be used as a repair and retrofit and launch bay. Basically, there Apollos are stored in a storage bay, and when they have to launch, or be repaired they are moved into the hangar.
The blast shields, robotic hands, gear cranes and overhead catwalks aren't there because I haven't modeled them yet.

As for the wall texture, yeah I'll probably remake it, after seeing what you guys think of it. Unfortunately, my texture skills are limited pretty much to Max procedurals. So unfortunately, no frescos, unless some of you are willing to help me.
Stryke, you'll get your colored insignia, everything, etc. but first look at my first post. I haven't done anything that is on the main floor. Nothing. zilch. zip. zero. null.
Raa', yes that's an apollo. Fits rather well, don't you think?
Now I'm gonna go think how the new wall texture should look like. Ideas welcome.