Astrolis
An ancient Astral Elf civilization. The people there were very introspective. They were not interested in exploring. We don’t know where it is or if it still exists. We only know of it because we heard about it in Galenden Hem‘s library. There is a Star Map that shows where it is. It also depicts Craia‘s Owl constellation.
The Library of Dun Eideann is a copy of Astrolis’ Library