Just in time for the premiere this Sunday.
The author of this article is Dr. Kelly DeVries, a fantastic history professor I was lucky enough to have when I attended Loyola University (then College) in Maryland during my undergraduate years. He's a medievalist, among many things, and has recently published this great piece over at Foreign Affairs on the historical aspects of Game of Thrones. (On a somewhat personal note, I love that almost ten years after graduation I can keep up with Dr. DeVries through Facebook and simultaneously discover that we have a mutual affection for Martin's work.)
For the history geeks among us, this is a must read. DeVries gives a great overview on what is and what isn't historical, and why keeping to the history books can actually be a good thing. From the article: