The Side Chambers of the Holy Place in Herod's Temple ISBE
The walls of the temple appear to have been 5 cubits thick, and against these, on the North, West, and South, were built, as in Solomon's Temple, side-chambers in three stories, 60 cubits in height, and 10 cubits in width (the figures, however, are uncertain), which, with the outer walls, made the entire breadth of the house 60 or 70 cubits. Mid., iv.3, gives the number of the chambers as 38 in all. The roof, which Keil speaks of as "sloping" (Bib. Archaeology, I, 199), had gilded spikes to keep off the birds. A balustrade surrounded it 3 cubits high. Windows are not mentioned, but there would doubtless be openings for light into the holy place from above the sidechambers.