The Palantir of Annúminas may have eventually been relocated to Fornost that of Amon Sûl was taken to Fornost when the Tower of Amon Sûl fell to the Witch-king's forces in TA 1409. As a military fortress, it served to guard the gap between the North Downs and the Weather Hills against incursions by the forces of Rhudaur or Angmar. įornost was located along the southernmost edge of the North Downs. Eärendur's eldest son, Amlaith became King of Arthedain and moved the royal capital from Annúminas to Fornost. In TA 861, when King Eärendur died, Arnor was divided into three kingdoms, Arthedain, Cardolan and Rhudaur.