In the book series A Song of Ice and Fire, the Iron Throne is constructed out of thousands of swords from fallen enemies. In HBO's Game of Thrones, it consists of one maybe-Easter egg that might surprise you.
An eagle-eyed Redditor named NoMoreHodoring has taken a closer look at the Iron Throne and pointed out that Gandalf's sword Glamdring is one of the many weapons melted and forged into the Iron Throne of the Seven Kingdoms.
Here's what we can see:
And here's Gandalf's faithful weapon of choice up close, Glamdring:
If they can recycle President Bush's head, they can certainly recycle Glamdring, right?
But, could it be that the sword is just a common design for a hilt? The inset gem on the Game of Thrones sword is slightly bigger, and the base of Glamdring's blade is jagged, while the sword on the Iron Throne is clearly straight.
Still, I'd like to believe - just for a second, that Game of Thrones and Lord of the Rings were set in the same world... but I'm not going to kid myself; nobody in the LotR universe would make it out of book one of Game of Thrones alive... just saying.