- "Except the Vale has been conquered, those vaunted mountains didn't stop the Andals who came by the eastern sea. The people of the Vale say that Ser Artys Arryn, the Andal general, flew on the back of a giant falcon and slew the Griffin King on top of the tallest mountain."
- ―Petyr Baelish
The Griffin King was the last of the Mountain Kings, a First Men dynasty that ruled the Vale since the Dawn Age in Westeros. He lived at the end of the Age of Heroes and the beginning of the Andal invasion of Westeros.
In the books
In the A Song of Ice and Fire books, the Griffin King is said to have dueled the Winged Knight atop a mountain known as the Giant's Lance. As much of Westeros' old history, this story may be a product of myth and confusion.