Great Empire of the Dawn: Dragonlords of Ancient Asshai
Mythical Astronomy of Ice and Fire - A podcast by David Lightbringer
Evidence abounds for the existence of a pre-Valyrian, pre-Long Night civilization of dragonlords, now mostly vanished from the pages of history. The evidence leads us to Asshai, and to a legend of a Dawn Age high civilization called the Great Empire of the Dawn... This is the audio version, but I highly recommend checking out the video on YouTube, as I included a lot of amazing Asshai, Five Forts, and Essos artwork that you probably haven't seen, as well as some handy-dandy visual aids and maps and things. Cheers!
