Khazad-dûm, perhaps the most famous of the dwarf-mansions, was founded by Durin the Deathless, and was their pride until 1980 of the Third Age when the Longbeards' mining efforts awoke the Balrog sleeping there. Most dwarves known from Tolkien's works are Longbeards- many in fact are of the line of Durin. Known also as Durin's Folk, the Longbeards are the House of Durin the Deathless, eldest Father of the Dwarves who, unlike the others, woke alone beneath Mount Gundabad in the Grey Mountains. Most Player dwarves are assumed to be Longbeards by quest dialogues unless they are specifically a Stout-axe. The most well-known of the dwarf-clans is that of the Longbeards.