High Quality Content by WIKIPEDIA articles! The Valar are characters in J. R. R. Tolkien's legendarium. They are first mentioned in The Lord of the Rings, but The Silmarillion develops them into the Powers of Arda or the Powers of the World. They are angelic powers, the Ainur that chose to go into the World and complete its material development after its form was determined by the Music of the Ainur. Eru Ilúvatar first revealed to the Ainur his great vision of The World through musical themes. ... unfolding a history whose vastness and majesty had never been equalled ... The Music of the Ainur, The Silmarillion.