To the south, the more dilapidated Temple of Hera (also known, mistakenly, as the Basilica) is a hundred years older and is Paestum's oldest, predating Athen's Parthenon by one hundred years.
The Temple of Hera is the oldest temple in Paestum.
If labor rates for engineering and project management is 50 - 100 percent greater than construction labor, then about 17,000 to about 28,000 man-hours of engineering and project management are needed for the project.