Belegost:  "Gabilgathol"

Northernmost of the two great dwarf cities of the Blue Mountains. These Dwarves had better relations with the elves than their neighbors in Nogrod. Responsible for the building of the Menegroth. They fought bravely besides men and elves in the Nirnaeth Arnoediad. The city was founded before the first age and destroyed in the War of Wrath. Loacted to the east of Mount Dolmed in the Ered Luin. Belegost means "Great Fortress".

Mount Dolmed:

Loacted in the center of the Blue Mountains in between the two dwarf cities of Nogrod and Belegost.

Ered Luin: Blue Mountains, Ered Lindon.

Loacted in the western borders of Eriador where it marchs with Lindon.

War of Wrath: The Great Battle.

In the year of 583 of the First Age. After Earendil came to Valinor to beg for the assistance of the Valar, sent a mighty force into Middle-Earth to do battle with Morgoth. Led by Eonwe, the Herald of Manwe, the forces of the Valar with the people of the Vanyar and the Noldor that had remained in Aman sailed eastwards in the ships of the Teleri. In the great battle that followed Morgoth's army was almost completely destroyed. Only a few balrogs, dragons, and orcs survived. Morgoth himself was taked as prisoner and shut beyond the confines of the world. The Silmarils were recovered from his Iron Crown. In the tumult of the war, Beleriand and the lands of the north were destroyed and sank to the sea, including the destruction of the great dwarf cities of Nogrod and Belegost. The shape of Middle-Earth was forever changed.