

The supreme deity of Tolkien's universe is Eru Ilúvatar. Main articles: Ainulindalë and Cosmology of Middle-earth Most Middle-earth stories take place in the first three Ages of the Children of Ilúvatar.Īrda is, as critics have noted, "our own green and solid Earth at some quite remote epoch in the past." As such, it has not only an immediate story but a history, and the whole thing is an "imagined prehistory" of the Earth as it is now. All the subsequent Ages took place during the Years of the Sun. The first such Age began with the Awakening of the Elves during the Years of the Trees and continued for the first six centuries of the Years of the Sun. A separate, overlapping chronology divides the history into 'Ages of the Children of Ilúvatar'. Time from that point was measured using Valian Years, though the subsequent history of Arda was divided into three time periods using different years, known as the Years of the Lamps, the Years of the Trees and the Years of the Sun. Tolkien's legendarium, the history of Arda, also called the history of Middle-earth, began when the Ainur entered Arda, following the creation events in the Ainulindalë and long ages of labour throughout Eä, the fictional universe. Tolkien meant Arda to be "our own green and solid Earth", seen here in the Baltistan mountains, "at some quite remote epoch in the past".
