The Pritzker Prize presentation ceremony , which moves to an architecturally significant location each year , was held in the Pritzker Pavilion in April 2005 . Among the annual performers at the pavilion are Steppenwolf Theatre , Lyric Opera of Chicago and the Chicago Symphony Orchestra ( CSO ) . At the end of the Grant Park Music Festival season in August , the Festival 's Grant Park Orchestra and Carlos Kalmar presented Pulitzer Prize-winning composer John Adams ' '' On the Transmigration of Souls '' , which was written at the request of the New York Philharmonic to honor the victims of the September 11 attacks . On Sunday September 11 , 2005 , United States Senator Barack Obama ( who was later elected President of the United States ) served as guest narrator for a 9/11 tribute concert by the CSO . The focal work of the concert was Aaron Copland 's " Lincoln Portrait " and the concert was led by former CSO resident conductor William Eddins
September 11 attacks
September 11 attacks
Jay Pritzker Pavilion