the 57th Street elevation. The northern elevation contains no setbacks. At the 16th through 21st stories on 57th Street, there are setbacks at every floor except the 18th. Along this elevation of the facade, the center two vertical bays project slightly from the 17th to 20th stories. Above the 20th story, the building rises as a continuous rectangular tower. At the 38th and 40th stories are setbacks with black stone bands. The roof of the building, above the 40th floor, also contains some setbacks for mechanical equipment. Facade Base The lowest six stories of the Fuller Building are clad in black Swedish granite. Along the southern side, facing 57th Street, the facade consists of eight bays. The western side, on Madison Avenue, consists of four bays. There are two entrances at the base: the main entrance on 57th Street and the secondary one on Madison Avenue. In general, the Fuller Building's art galleries have tended to use the address 41 East 57th Street, while the offices have used the address 595 Madison Avenue. The main entrance portal is in the fourth bay from west on 57th Street; it is three stories high and is flanked by granite-and-stone pilasters. There are four brass-framed glass doors at ground level, slightly recessed from the street. In front of and above the doors is a glass panel, which hangs from a bronze lintel with diamonds. At the center of the lintel is a glass-and-brass light fixture topped by an eagle. The second and third floors of the main entrance portal contain a grid of square windows framed by metal mullions. Atop the third story are stone-on-granite letters reading . Above this sign, at the fourth story, is a limestone sculptural group designed by Elie Nadelman. The sculptural group represents two construction workers flanking a clock, behind which is a carving of a skyline. The secondary entrance is a single-story opening in the northernmost bay on Madison Avenue. The Madison Avenue entrance contains a brass service elevator door on the left and a brass-framed glass double door on the right. Atop these doors, but beneath the second story, is a sign with the stone letters . The rest of the base is designed similarly on both street facades. The ground level generally contains storefronts separated by vertical granite piers, which extend through the second to sixth floors. The second through fifth floor windows are separated