Incensed

The Torah lays out the dimensions of the sanctuary the Jews were to build in the desert, as well as a precise description of the garments to be worn by the priests. After all is said and done, almost as an afterthought, another item is added; the golden altar of incense, to be placed across from the golden menorah. But despite its seemingly "last place" position in the Torah account, it was of paramount importance. The incense which was burned on it was an integral part of the daily service, and featured most prominently in the Yom Kippur order as the central service of the day. So why is the imperative to build this altar left until the end?