Temple of Saturn. The state treasury, Aerarium, was held in the temple under the stairs that were right in front of the podium. Another affair that went on in the temple was the sacrifice for Saturnalia and also the releasing of the bonds on the statue of Saturn, both were done on Saturnalia. Saturnalia is a Roman holiday that they celebrated on December 17-23 in honor of the god Saturn. Saturn was the god of agriculture which is where the Romans got their wealth.