Dragon lore refers to folklore about dragons consisting of legends, oral history, fairy tales, stories etcetera. When asked in what place, if any, has there been an accumulation of dragon lore George R. R. Martin replied "Valyria, the Citadel, Dragonstone, probably some of the Free Cities as well. Maybe Asshai in the far east."
King Aegon V Targaryen wished to restore dragons to the Seven Kingdoms. The last years of his reign were consumed by a search for ancient lore about the dragon breeding of Valyria, and it was said that Aegon commissioned journeys to places as far away as Asshai with the hopes of finding texts and knowledge that had not been preserved in Westeros.