The exterior of this mammoth, five-block long building is an assemblage of rectilinear forms all shaped by a framework of prefabricated steel modules fitted with clear glass. Inside, the structure is supported by tubular steel pillars that resemble chunky champagne glasses. At its south end there’s a spectacular 150-foot-high lobby, dubbed the crystal palace. Also housed within the center’s 1.8 million square feet: a 2,500 seat auditorium and acres of exhibition halls and meeting rooms.