Alexander Calder’s sculpture “Universe” greeted visitors in the Willis Tower lobby for decades. It made a big impression, so people noticed when it vanished in 2017

Martin, a listener who’s worked in the downtown building for eight years, was there when the sculpture was boxed up. He reached out to WBEZ to find out what happened to the piece, and Reset “Lost & Found” contacted an expert for some insight.

GUEST: Elizabeth Blasius, architectural historian and writer; co-founder of Preservation Futures