Tumûn-gabil was originally a dwarf-mine below Amon lanc, founded by adventurous dwarves of Dwálin the wise and Drúin the Proud´s peoples.Later it was overrun by Orcs and became the secret hideout of the being known as the Necromancer, who built the tower of Dol Guldur upon the hill.
History:[]
S.A. 20 Druin the Proud lay claim to Amon Lanc and founds the strong hold of Tumun-gabil
S.A. 97 Druin leads part of his clan to he Khailûzan lands, Borin stays behind to rule Tumun-gabil.
S.A. 1165 Some of Druin’s folk fled Rûrîk taking refuge in Tumun-gabil ("company of 50") and then in the Ered Luin.