After the banishment of Fëanor from Tirion, he and his seven sons went north of Valinor and fortified Formenos. Some of the Ñoldor, including their King Finwë, went with Fëanor. In Formenos, they spent twelve Valian Years (about fifty years of the Sun) in exile.
It was also home to the treasury of Fëanor where he kept the three Silmarils in a chamber of iron. Melkor slew Finwë at the doors of Formenos, before stealing the jewels which led to the Darkening of Valinor.
- ↑ The History of Middle-earth, Vol. 10: Morgoth's Ring, The Annals of Aman
- ↑ The Atlas of Middle-earth, The First Age, The Elder Days, "Valinor"
- ↑ The Silmarillion, Quenta Silmarillion, Chapter IX: "Of the Flight of the Noldor"
- ↑ The Silmarillion, Appendix: Elements in Quenya and Sindarin names
- ↑ Parma Eldalamberon, Words, Phrases and Passages in Various Tongues in The Lord of the Rings by J.R.R. Tolkien