Saruman was the chief of the wizards in his time and dwelt in the fortress of Orthanc in Isengard, below Methedras. The Istari were five wizards who were sent to Middle-earth to combat the growing power of Sauron, the Dark Lord. Saruman studied in depth the arts of Sauron. However, he soon became enamored of Sauron's devices, especially the One Ring, turned traitor to his mission, and sought power for himself by attempting to find the One Ring. He initially advocated an alliance with Sauron, but he soon betrayed Sauron as well, as his ultimate goal was to supplant Sauron and rule Middle-earth.