Spoilers for Game of Thrones season 6, of course.
In an episode that featured long, magnificent musical scores, it's fitting that a scene in the Game of Thrones season 6 finale, "The Winds of Winter," explained a subtle detail embedded within the most iconic Thrones music moment of all: the intro credits.
You see this thing at the beginning of every episode.
Zoomed in, it features carvings depicting various events from Westerosi history. Here's the Lannister lion and Baratheon stag ramming and thereby ending the long reign of the Targaryen dragon.
An even more subtle detail in the season finale itself explained where that orb-ish apparatus comes from—apparently it's a dangling, chandelier type device in the Citadel's library.