Tirion, known fully as Tirion upon Túna, was the city of the Ñoldor in Valinor in Aman. It was from here that Finwë ruled, and where his sons Fëanor, Fingolfin and Finarfin lived. J.R.R. Tolkien's original name for this city - until the final development of his many tales of the First Age, as accounted in The History of Middle-earth - was Kôr.