The “millo” (MIL-loh; related to the Hebrew word for “earthen fill”) was a terraced supporting construction in Jerusalem (and probably elsewhere), which continually needed repair and strengthening. The word is used six times in the Bible. “Beth (BAYT) Millo” was the “House of Millo,” a building associated with the millo, apparently the king’s palace at the “Lower House of the King,” in the City of David.