'Middle' in the Bible

The lowest story was five cubits wide, the middle was six cubits wide, and the third was seven cubits wide; for he made offsets (niches) in the walls all around on the outside of the house so that the supporting beams would not be inserted into the walls of the house.

The entrance to the lowest side chamber was on the right [or south] side of the house; and they would go up winding stairs to the middle [level], and from the middle to the third.

On that same day the king consecrated the middle of the courtyard that was in front of the house (temple) of the Lord; for he offered there the burnt offerings, the grain offerings, and the fat of the peace offerings, because the bronze altar that was before the Lord was too small to hold [all] the burnt offerings, the grain offerings and the fat of the peace offerings.