Alexander Beleschenko specialises in architectural glass, using a variety of techniques to produce a wide range of beautiful and dramatic projects. The concourse level glass walls employ a new technique using poured resin infill combined with enamel glass to create a flurry of swirling shapes which sweep one through this underground entrance to the Citigroup Tower. On the ground floor, 'walls of light' create a corridor made of antique mouth-blown glass bonded to industrial toughened glass infilled with white swirls of resin.