'Upper' in the Bible

All of a sudden, I noticed six men approaching from the direction of the upper gate, which faces north. Each of them held a destructive weapon in his hand. Among them there was one man, clothed in linen, who was equipped with a writing set at his side. They went in and presented themselves beside the bronze altar.

The upper chambers were narrower, since the galleries required more space than did the lower and middle portions of the building.

The three part structure had no columns, unlike the courts, which is why the upper chambers were offset from the ground upward, more so than the lower and middle chambers.