Trudge up another level to admire the spectacular theatre positioned above the Temple of Apollo (center) and the Pleistos Valley. The arena was initially constructed during the 4th century BC. Refurbishments occurred in 159 BC, in 67 AD (in order to impress Roman emperor Nero) and again during the 2nd century AD. The cavea (seating) consists of 35 rows of limestone benches in a crescent formation. The theatre could accommodate 4,500 to 5,000 spectators of plays and concerts. If you have the energy, you might want to walk another 165 feet up the hill to the stadium. It was built in the late 4th century BC. The bleacher-style seating stretches 584 feet overlooking an athletic field. Up to 6,500 sports fans could watch the competitions conducted on as many as 20 tracks.