Olwë, brother of Thingol, lived in Alqualondë. The city is said to be north and east of Tirion between the Calacirya and Araman in northern Eldamar. It is perhaps best known as the site of the first Kinslaying recounted in The Silmarillion.
The city was built in a natural harbour made of rock, and was also walled for some reason. Other than the great harbours it also housed the tower of Olwë. The city was covered with pearls which the Teleri found in the seas and jewels which they obtained from the Noldor, and their ships were moored here.