Fairy Tale
Before Martin brought us to the Seven Kingdoms, Before the Workshop crafted it's first Game, before Gygax mastered his first Dungeon and even before Professor Tolkien wondered what sort of hole a creature called a hobbit would dwell in, there were Fairy Tales. Nowadays when we here the term, we imagine simple stories that are read to children at bedtime.
The Brothers Grimm published the (probably) first written collection of fairy tales in 1812 - Kinder und Hausmärchen (Children's and Household Tales), gathering up oral stories that had existed for hundreds of years. Despite claims of Disneyfication, the sanitising of fairy tales started with the Grimm's themselves in their second edition as much of it was considered unsuitable for children. (The wicked stepmothers in many of the tales were originally biological mothers, but the brothers loved their mother too much to keep that in).