Ah, at first I thought it was a Skyrim art))) Many common elements are there on this picture and in game's stuff.
The GoT fandom is unfamiliar to me (wanna join, but can't so far), but this picture looks great. It shows the most known, impressive and symbolic characteristic of the character. I like such arts, they are very eloquent. And, saying about this specific picture - very detailed and stylish painting. Lovely!