there's a book series called A Song of Ice and Fire, which is awesome. you should read it ; ) and there's an awesome artist called Ted Nasmith, who mainly does Lord of the Rings stuff. but he also did a series of the castles from ASoIaF. [link]
I'm quite with you. In fact, this is something like a missing piece to my own picture of Angband (plus Thangorodrim, haha! ) that you don't know has been missing until you see it. Nicely done, and I LOVE the sky!