From Destinypedia, the Destiny wiki
Lost Forges are weapon forges created by the Black Armory during the Golden Age. Three of the forges were lost during the Collapse, while a fourth, the Volundr Forge, remained active and run by Ada-1 until the Red War. Control of the Volundr Forge was regained by the Black Armory with the aid of the Young Wolf.
List of Lost Forges
List of appearances