The work that these priests do is really only a copy and a shadow of what is in heaven. That is why God warned Moses when he was ready to build the Holy Tent: “Be sure to make everything exactly like the pattern I showed you on the mountain.”
Then David gave his son Solomon the plans for building the Temple. They included plans for the porch around the Temple, its buildings, its storerooms, its upper rooms, its inside rooms, and the room for the mercy-cover.