Di Suvero's industrial art complements urban skyline.

Byline: Whitney Gould

Jun. 4--CHICAGO -- Even before it was installed 25 years ago at the east end of Wisconsin Ave., people were arguing about "The Calling," Mark di Suvero's bold orange sunburst made of steel I-beams. The debate heated up once again in 2001 after Santiago Calatrava's poetic white addition to the Milwaukee Art Museum spread its wings just behind the sculpture.

The critics groused that the di Suvero was blocking views of the Calatrava and should be moved. They're still grousing, to judge from my never-ending e-mails on this subject.

I've always been dismayed by the complaints. To me, great works of public art and architecture carry on a musical conversation -- in this case, di Suvero's exuberant symbol of the muscle that …