In these days of CAD (computer-aided design) the structures of Constantin Brancusi, Georges Vantongerloo, El Lissitsky and Vladimir Tatlin may feel quaint.
Sharply angled steel-and-glass enclosures for stairs and elevators recall early Russian constructivist designs like Tatlin's elaborate unbuilt platforms rising precariously into thin air.
Tatlin's 1920 "Monument to the Third International" is here in a massive 1979 reconstruction and belongs to an older tradition of visionary architecture as much as it does to the innovations of abstraction.