It is estimated that the temple was built around 550 BC yet another temple, built one century prior to this one, pre-existed at the same position. In fact, the old one was renovated during the restoration of Corinth and then devoted to Poseidon.
It was a peripteros temple with six columns along its narrow sides and fifteen columns along the long ones. Extra columns, in the Doric style, had been constructed in the antetemple and the back chamber of the temple as well as two internal colonnades in the cella, which supported the ceiling.
Nowadays, only 7 out of the 40 columns keep standing at their initial position.