Foundation of Erebor
Event Type: Political
Age: 3rd Age - The Kings
Thráin I comes to Erebor and founds a dwarf-kingdom 'under the Mountain'.
The Return of the King, LoTR Appendix B, The Tale of Years: The Third Age
Most of these that escaped made their way into the North, and Thráin I, Náin's son, came to Erebor, the Lonely Mountain, near the eastern eaves of Mirkwood, and there he began new works, and became King under the Mountain. In Erebor he found the great jewel, the Arkenstone, Heart of the Mountain.
The Return of the King, LoTR Appendix A, Annals of the Kings and Rulers: Durin's Folk
added quote & links: Elena Tiriel 7Oct05