Erebor, stronghold of Thrór, King under the Mountain and mightiest of the Dwarf-lords. Thrór ruled with utter surety, never doubting his house would endure, for his line lay secure in the lives of his son and grandson. Built deep within the mountain itself, the beauty of this fortress city was legend. Its wealth lay in the earth, in precious gems hewn from rock and in great seams of gold running like rivers through stone. The skill of the Dwarves was unequaled, fashioning objects of great beauty out of diamond, emerald, ruby, and sapphire.