Temple of Saturn

“The Temple of Saturn is the oldest temple in the forum, consecrated c. 498 B.C., and built earlier, during the period of the kings of Rome. It was rebuilt 2 times. The Temple of Saturn was destroyed in 42 B.C. and then in A.D. 283, and then rebuilt under Diocletian. The Roman winter solstice festival of Saturnalia began with a sacrifice at the Temple of Saturn. Saturday is named for him.Saturn was a Roman agricultural god paired with the Greek god Cronos.”

reference: About.com