Eregion

Eregion
J. R. R. Tolkien's legendarium location
Other name(s)	Hollin
Type	Pleasant land of holly, with many Elvish ruins
Notable locations	Ost-in-Edhil; the Elven-way
Location	West of the Misty Mountains near Moria
Lifespan	Second Age c. 750 - 1697
Founder	Noldor

In the fiction of J. R. R. Tolkien, Eregion or Hollin was a realm of the Noldorin Elves in eastern Eriador during the Second Age, located near the West Gate of Moria under the shadow of the Hithaeglir (Misty Mountains). Its capital was Ost-in-Edhil (literally Town of the Elves). This city was established by the Noldor in the year 750 of the Second Age, located where the Sirannon met the Glanduin. The elves built a highway, the Elven-way, to connect Ost-in-Edhil to the West Gate of Moria.

Eregion was populated by Noldor, and for a while ruled by Galadriel and Celeborn, until they left for Lothlórien on the other side of the Misty Mountains. The Elves of Eregion lived in harmony with a Dwarf civilization, namely the kingdom of Khazad-dûm, or Hadhodrond in the Elven tongue. There was great trade between the two realms, facilitated by the Elven-way.

After Galadriel and Celeborn had left, Eregion was ruled by Celebrimbor, grandson of Fëanor. Under his rule the Elves of Eregion became friends with Annatar, Lord of Gifts, and created the Rings of Power. When Annatar was revealed as the Dark Lord Sauron, the Elves of Eregion tried to keep the Rings from falling in Sauron's hands. Outraged, Sauron invaded Eregion in SA 1695 with a large force, and two years later it was utterly destroyed and many of its people, including Celebrimbor, killed. Sauron took most of the rings for himself, but the Elves managed to rescue Vilya, Narya, and Nenya, (the Three Rings of the Elves). After Eregion's destruction its survivors fled to Lindon, Lothlórien, and the refuge of Imladris (Rivendell).

...
Wikipedia