-18000 DR

* Ghaunadaur is discovered by some Ilythiiri houses and worship begins in secret. Rival Ilythiiri houses find and begin worship of other evil deities, such as Lolth, in the years that follow.
* The Citadel of the Raven is estimated to have been built around this time, suggesting the presence of a great prehistoric human civilization.
* The great wyrm Ossavitor develops a magical means by which a dragon can attain immortality, known as Ossavitor's Way.
==Appendix==
===References===
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 17000