The Temple of Apollo at Didyma - The Greeks built the Temple of Apollo at Didyma, Turkey (about 300 BC). The design of the temple was known as dipteral, a term that refers to the two sets of columns surrounding the interior section. These columns surrounded a small chamber that housed the statue of Apollo. With Ionic columns reaching 19.5 m (64 ft) high, these ruins suggest the former grandeur of the ancient temple.