The temple, whose structure is still under debate, measured 112.7 x 56.3 m at the stylobate, with a height of some 20 m. The whole construction was made of small stone blocks, which has led to uncertainty to the total size of the building. According to Diodorus, the columns' grooves could easily house a man; their height has been estimated from 14.5 to 19.2 meters. Each stood on a five-stepped platform approximately 4.5 m above the ground. The enclosure occupied a large basement with a five-step crepidoma. The front of the temple had seven semi-columns, an archaic feature that precluded the addition of a central door. The long sides had fourteen semi-columns.