Floor Plan of the Palace at Nimrud
One peculiarity is visible in all Assyrian buildings, namely, that all the chambers are very narrow in proportion to their length. It may, however, be accepted as established that the chambers were in general lighted by windows, which were inserted in the walls either high up or immediately under the roof, and that only large halls received their light from above through openings in the roof.
A. Rosengarten, W. Collett-Sandars A Handbook of Architectural Styles (New York, NY: Charles Scribner's Sons, 1895)
Courtesy the private collection of Roy Winkelman