Designed by Mario Botta in 1995.The interior is flooded with natural light the full-height central atrium court is illuminated by the enormous circular skylight of the turret, and features a dramatic truss bridge traversing the space at the fifth-floor level. The striation on the exterior of the turret is echoed in the alternating bands of polished and rough Canadian granite appearing on the atrium’s floor and lower columns. A grand atrium staircase is complimented by the paintings of Elsworth Kelly.