The Temple of Juno was built in the middle of the 5C BC and burnt down by the Carthaginians in 406. You can see the marks left by the smoke on the walls of the cella, the chamber in which the statue of the goddess stood. Although the temple is not in a perfect condition, the colonnade in the pronaos, like those in the opisthodomos and the cella are well preserved. In case you were wondering... the opisthodomos is the section at the rear of the temple, opposite the pronaos.