The side rooms were in three stories, one above the other, thirty rooms in each story; they rested on ledges which were for the side rooms all around, that they might be supported, but not fastened to the wall of the house.

As one went up from story to story, the side rooms became wider all around, because their supporting ledges in the wall of the house ascended like steps; therefore the width of the structure increased as one went up from the lowest story to the highest by way of the middle one.