Thursday night, the festival moves to Pritzker Pavilion in Millennium Park, a change for Jazz Fest.
The Petrillo Music Shell in Grant Park was the previous home for the last big festival of the summer.
The 35th annual Jazz Fest runs through Sunday.
Additional information: http://www.cityofchicago.org/city/en/depts/dca/supp_info/chicago_jazz_festival.html