Alalminórë was the central region of the island of Tol Eressëa, according to the early version of the legendarium in The Book of Lost Tales.
The region was regarded as the fairest part of the island, where many towns and villages of the Elves were located. It was also where Kortirion, the chief city of Tol Eressëa was situated in, on the banks of the Gliding Water.
After the March of Liberation and the defeat of Melko, many of the exiled Elves and Gnomes moved to Alalminórë, led by Ingil son of Inwë. There, they built the city of Koromas, later known as Kortirion due to the great tower that Ingil built there at the topmost part of the city.
It was also where the Cottage of Lost Play could be found, which Eriol, the Mannish mariner, visited on his sojourn in Tol Eressëa. Another place in the city that he visited was the home of Meril-i-Turinqi, the Lady of Tol Eressëa, at the foot of Ingil's tower in a korin of elms. A famous half-fay minstrel, Tinfang, loved to visit Alalminórë above all the other parts of the island.
Sometime during the 5th century AD, following the disastrous Faring Forth and the dragging of Tol Eressëa across the Ocean to be anchored off the coast of the Great Lands, Men invaded the island, along with other evil creatures, such as Orcs and Trolls, which resulted in the displacement and eventual fading of the Elves on the island.
However, not all Men were hostile to the Elves, and these became the ancestors of the English. One of them was Hengest son of Eriol, who invaded Kortirion, and made it his capital, afterwards known as Warwíc and eventually as Warwick - with Alalminórë, the region surrounding Warwick, becoming known as Warwickshire.