Wednesday night at 6:30 PM, conductor Carlos Kalmar leads the Grant Park Orchestra and Chorus in a free performance of Brahms’s longest composition, A German Requiem, at the Harris Theater (205 E. Randolph). Soprano Karina Gauvin (pictured) and baritone Richard Zeller will sing solos.

The theater, located at the north end of Millennium Park, seats just over 1,500. For more information, check out the Grant Park Music Festival’s Web site here