horizontally by bronze spandrel panels with wave-and-inverted ziggurat designs. The fifth and sixth floors are separated horizontally by a granite band with a Greek key motif made of limestone. The window openings on each floor consist of large glass panes surrounded by smaller panes. Upper stories At the seventh floor, the design of the facade changes to a light-colored limestone cladding with black granite accenting. Centered above the 57th Street entrance, on the seventh through 16th floors, are five bays, each with four windows per floor, which correspond to openings at the base. Within these bays, each story is separated by horizontal bands that project slightly from the windows. Along 57th Street, the outer bays on the seventh through 16th floors consist of single-width windows with limestone piers. The center two bays on Madison Avenue have similar horizontal bands and four-window-wide bays as on 57th Street, while the outer bays contain narrower windows. On the first 17 floors, the northern and eastern facades are clad with two-tone brick and are largely unornamented. On the eastern facade, there are horizontal and vertical yellow brick bands contrasting with a darker background. Above the 17th story, all of the facades contain single-width windows with limestone piers. Except for the northern facade, the 18th through 21st stories are clad with limestone on all sides. At the lintels above the 20th-story windows, there are black-stone geometric designs, and the piers between each bay are capped by stone slabs. The northern facade on these stories contains intermittent limestone cladding with brick. Above the 20th story, the west, south, and east facades are designed identically and are each six bays wide. On these facades, the two center bays are flanked by wide piers and separated by a narrow pier, with recessed spandrels separating the windows on each floor. Within the four outer bays on each facade, the windows on different stories are separated by horizontal bands. In the center bays from the 36th to 39th stories, the piers contain horizontal bands. The spandrels beneath the 36th and 37th floors contain black vertical lines, and there are balconies on the 38th floor. At the 39th floor are black-and-white sunburst motifs flanking a round window in the center bays. The roof above the 40th floor contains friezes with black-and-white triangles and zigzag patterns. The northern facade is similar but has no windows in the center two bays. Additionally, there