Sauron and the elves together made sixteen rings. The Elves also made three rings by themselves, called Vilya, Nenya and Narya. These nineteen rings were the "Rings of Power". But Sauron secretly forged a Great Ring of his own, the "One Ring". In this Ring Sauron put half of his power. He planned to control the wearers of the other rings with this One Ring. But the Elves finally realized that Annatar really was the evil Sauron and hid the Rings of Power.