The Temple of Neptune (or Apollo or Hera II) dates from 450 BC and is the most complete of the three - everything remains intact except the roof and parts of the inner walls. It has double rows of columns. On the east side are remains of two altars, one large and one smaller. The smaller one was added by the Romans when they cut through the larger altar to build a road to the forum. Statues around the larger altar may indicate that Apollo was patron of the temple. Another possible dedication is Hera, like the older temple next to it.