The Mourner Headquarters serves as the base for the military and strategic activities of the Iorwerth elves during the later part of the Elven Civil War. During this time, access to the headquarters is restricted only to those wearing only full Mourner gear, the standard uniform of a Mourner with rare exceptions. After the defeat of Lord Iorwerth, the successful overthrowing of the Mourners in West Ardougne, and the restoration of Prifddinas, the building no longer serves this purpose.