I that case it's what Fylimar wrote.

But walking back to the Sanctum and the village, has somebody pieced together the exact(ish) timeline for the fall of those? I feel much of it hints towards Ketheric along with some internal medical malpractice being the cause of the their fall, which sets both a century in the past. But then there are elements that feel much more recent, like the remnants of children's games.