ArmenelosArmenelos - The capital of Númenor.

 

"...and hard by upon a hill was Armenelos, fairest of cities, and there stood the tower and the citadel that was raised by Elros, son of Eärendil, whom the Valar appointed to be the first king of the Dúnedain." ~The Silmarillion (Akallabêth)

 

"The land of Númenor resembled in outline a five-pointed star, or pentangle, with a central portion some two hundred and fifty miles across, north and south, and east and west, from which extended five large peninsular promontories...The central portion was called Mittalmar (Inlands), and it had no coast, except the land about Rómenna and the head of its firth.  A small part of the Mittalmar was, however, separated from the rest, and called Arandor, the Kingsland.  In Arandor were the haven of Rómenna, the Meneltarma, and Armenelos, the City of the Kings; and it was at all times the most populous region of Númenor." ~Unfinished Tales (A Description of Númenor)