Less than 1 km from Delos town is the ancient theater of Delos. It was started in 314 BC and finished 70 years later. It is separated in two parts, upper and lower, 26 and 17 levels respectively, with a seating capacity of approximately 6,500 spectators. It isIt is one of the ancient Greek theaters which were completely built with marbles. Delos theater has a capacity of 6.500 people.