Built in 1967, the Norman Lykes House is Frank Lloyd Wright's final architectural design. It was completed after Wright's death in 1959 and is one of only 14 circular homes by the designer. Situated in Arizona's Phoenix Mountain Preserve, the Phoenix residence, also called the Circula Sun House, blends into the rocky desert landscape with a curved concrete form. Inside, arched walls afford panoramic views of the scenery, golden-hued Philippine mahogany-clad walls offer a warm complement, and signature built-ins are found throughout. The circular theme continues on the exterior with a round terrace featuring a crescent-shaped pool with mother-of-pearl tiles and holes cut into the exterior walls.