 At the top of the exterior walls is a row of openings similar to the windows below except that these openings are above the roof and have no glass. Vincent Scully said that Kahn was drawn to architecture based on "solid, almost primitive, masonry masses with voids in them without glass." The bottoms of these window-like openings are 6 feet (1.8 m) above the floor of an arcade that follows the perimeter of the top of building.
