Aes Sedai

The Aes Sedai are a fictional organisation in Robert Jordan's Wheel of Time series.

"Wielders of the One Power. Since the Time of Madness, all surviving Aes Sedai are women. Widely distrusted and feared, even hated, they are blamed by many for the Breaking of the World, and are thought to meddle in the affairs of the nations. At the same time, few rulers will be without an Aes Sedai advisor, even in the lands where the existence of of such a connection must be kept secret....

Notice interesting alternative to Sidhe

The Aes Sedai reside in Tar Valon, specifically the White Tower.