Okay, that is just awesome. I especially love how the atmosphere seems to exude all the qualities that you would expect for the throne-room of the Princess of the Night. Must.....resist...writing...fanfic...for...this..scene @_@
Wow, great work! I really love how you drew Luna and her guards - not just excellent in execution, but also conveying just how self-assured Luna is there, sitting on her throne in all her splendor, and how awe-inspiring facing her must be for the petitioner.
The stained-glass window with the Mane Six and Night Mare Moon's (re-)transformation is a very nice touch, too.
She must have it there (it's positioned so that she could view it fully from her throne) to remind herself of the failures of her past and grace that was shown her immediately after the 1,000 year moon exile. It gives her a little grounding, if not outright humility.