The Doric order was one of the three orders of Greek and Roman architecture (the other two are Ionic and the Corinthian). This temple, which fortunately survived the destruction that ensued during the Carthaginian sacking of Segesta, is a fantastic relic from that architectural era.

But strangely, as fine as the structure is, it has several components that suggest that the temple was never actually finished. The columns have not been fluted like they typically would would have been in a finished Doric temple. Also, the tabs that were used to lift the blocks of the base into place were never removed.