Moreover, King Cyrus brought out the articles belonging to the temple of the Lord, which Nebuchadnezzar had carried away from Jerusalem and had placed in the temple of his god. Ezra 1:7

            The articles from the temple were needed to perform the rituals in that temple.  These articles appeared as early as the tabernacle in Exodus and since they were so important, they were made of gold.  Over and over they were either stolen or given away to buy another nation’s protection.  These articles came from the Babylonian siege and now that they were being returned, the sacrifices could be used again in the temple.