|The Fields of Fornost as depicted in Turbine's LOTRO|
Fornost Erain (S. ‘North fortress of the Kings’, called Norbury or Norbury of the Kings in the Common Speech) was a city within the North Downs, and the second capital of Arnor. It later became the capital of Arthedain (from TA 861), and after the rise of the Witch-King and the fall of both Rhudaur and Cardolan, Fornost became the principal fortress of the Dúnedain of the North.
When King Arvedui was defeated in TA 1974, Fornost was captured by Angmar. It was freed the following year in the Battle of Fornost, but the North Kingdom never rose again, and Fornost was left deserted. From this point on, it was known as Dead Man’s Dike.