'Bases' in the Bible

We give news to the king that the Jews who came from you have come to us at Jerusalem; they are building up again that uncontrolled and evil town; the walls are complete and they are joining up the bases.

Then this same Sheshbazzar came and put the house of God in Jerusalem on its bases: and from that time till now the building has been going on, but it is still not complete.

In the first year of Cyrus the king, Cyrus the king made an order: In connection with the house of God at Jerusalem, let the house be put up, the place where they make offerings, and let the earth for the bases be put in place; let it be sixty cubits high and sixty cubits wide;