lobby for the First National Bank of Chicago, just east of the galleria, contained Agnes Denes's artwork Hypersphere: The Earth in the Shape of the Universe, a set of 144 glass panels. LeWitt commissioned a set of six geometric artworks for the walls of the galleria entitled Wall Drawing: Bands of Lines in Four Colors and Four Directions, Separated by Gray Bands. As the name indicates, LeWitt's artwork consists of vertical, horizontal, and diagonal bands in four colors, created in acrylic paint on limestone. These works, which are up to high, are illuminated by natural light coming through the rooftop skylights. In addition, Flanagan designed two bronze sculptures at the galleria's north and south ends, each depicting animals in whimsical scenes. The north end contains Young Elephant (1986), while the south end contains Hare on Bell (1985). Two escalators lead from the galleria to Axa Center's public basement concourse. The escalators are placed within a glass enclosure containing a gold-colored frame. The basement concourse is connected to Rockefeller Center's underground concourse, which in turn provides a connection to the New York City Subway's 47th–50th Streets–Rockefeller Center station. Axa Center's basement concourse also contains the Athletic & Swim Club, which has a fitness center and a small swimming pool. Valerie Jaudon had created a mural for the swimming pool's wall, measuring . Interior Axa Center contains of interior space. According to the New York City Department of City Planning, the building has a gross floor area of . Equitable was allowed to include an additional in exchange for providing privately owned public space. The steel superstructure contains two-story outrigger trusses wrapping around the 11th and 36th stories, which transfer the structural loads and absorb the wind loads at each of the setbacks. Belt trusses connect the outrigger trusses to the building's structural core. The roof is surrounded by a hat truss, behind which is mechanical equipment. From the beginning, 787 Seventh Avenue contained several "smart" building systems, such as high-capacity fiber optic cables and conduits, as well as a computerized display to monitor energy use, security, and elevators. The "smart" systems cost $2 to $4 million, though that cost also included a retrofit of 1285 Sixth Avenue. The building is internally connected to 1285 Sixth Avenue at the ground floor, concourse, and first eight stories. The 787 Seventh Avenue building was known as Equitable Center West or Equitable Tower, while the