Jay Pritzker Pavilion

This guide to Jay Pritzker Pavilion in Chicago's Millennium Park follows the promise architect Frank Gehry made before its criss-crossing steel trellis existed: that an open field would sound like a concert hall. It traces how the Oak Park acoustics firm Talaske, led by Rick Talaske and Jonathan Laney, set out to answer that promise for the Grant Park Orchestra with a system threaded through Gehry's steelwork. Steelworkers from Springfield, Missouri raised the six-hundred-foot trellis that carries it overhead.