Exodus 27

There were two altars in the temple, which expressed the two covenants in the church. The first, the altar of burnt offerings, which was plated with bronze and was situated in front of the doors of the temple, was for the offering up of victims and sacrifices. It signified the fleshly minded worshipers of the Old Covenant. And then there was the altar of incense, which was covered with gold and set near the entrance of the Holy of Holies and was to burn fragrant gums on. This prefigured the interior and more perfect grace of the New Covenant and its worshipers.