Tales from Elrond
Tyay-Besil was the ancient fortress-city of the shield dwarf kingdom of Besilmer. Built under the Sumber Hills in the Dessarin Valley, it was eventually overrun by hordes of orcs, trolls, and giants. Although the dwarfs of Besilmer had settled overground under the leadership of Torhild Flametongue, they suffered constant attack from these enemies, leading to the construction of the underground fortress city of Tyar-Besil. Torhild Flametongue was killed in combat against a hill giant on the Stone Bridge and this led to the dwarves fleeing the area, and later to the complete abandonment of Tyar-Besil.