Game Of Thrones Easter Egg you may have missed (and what it could mean). Spoilers ahead.

So there was something pretty cool in the last episode of Season six that didn't involve explosions or Speedy Gonzales Varys

Last chance to avoid spoilers.

In the library in Oldtown we see these massive, chandelier/gyroscope looking things.

They seem oddly familiar...

Oh right, they look just like the same device from the opening sequence of the show. But what does that mean?

If you're like me you love the pop up storybook style opening of the show.

But now that something within Westeros ties back to that opening it begs the question: who wrote that book? (other than George R.R. Martin).

What it means: in season six Game of Thrones established a narrator.

Someone within the show, sometime in the future, is telling us the story from the library in Oldtown. But who? Well who do we know in the library?

Time for my own theory.

Samwell Tarly is the maester to catalogue the period in history in which all of Game of Thrones takes place. He is the George R.R. Martin of George R.R. Martin's world. Which would mean he is the only character guaranteed to survive through to the end. But why would Sam be the one to carry such a responsibility? After all as of season six he hasn't even begun his maester training, there are certainly many much more qualified scholars who could write the official history. But as any budding historian can tell you, history is always written by the victor. So if Sam Tarly is on the winning side, that means...

Jon Snow wins the Iron Throne.

I know it's a bit of a reach, but bear with me. The big reveal of season six was that Jon Snow is not the son of Ned Stark but of his sister Lyanna and Rhaegar Targaryen. Making his claim to the Iron Throne stronger than Dany's. And last we saw Jon had just been declared King in the North, which means like it or not and regardless of the army of undead that he really cares about, he is in the great game.

A Song of Ice and Fire

The final clue to this theory is the title of the series itself. A Song of Ice and Fire is the story of the rise of King Jon Targaryen I. A king of both Stark and Targaryen blood. In the books Dany has a vision in the House of the Undying of her brother Rhaegar holding a baby (Jon) and proclaiming "his will be a song of ice and fire." So if the entire story has been about Jon the entire time it might be safe to assume he has a pretty good shot of making it all the way to the end. So after all the dust settles and Jon is on the Iron Throne, he will eventually need to appoint someone to write the official history of his reign. And who knows him better than his friend and trained maester Samwell Tarly?

Tl;dr

Just like Frodo ended up writing the book "The Lord of the Rings," Samwell Tarly is the narrator of the Song of Ice and Fire, having been appointed to do so by his friend King Jon Targaryen I. Long may he reign.

How Jon gets there and who else makes it that far we have no way of knowing. But as my fictional alcoholic gambler uncle used to say: "always bet on black."