The Grant Park Music Festival’s free concerts at Chicago’s Millennium Park this August will include a program marking the 60th anniversary of the Grant Park Chorus, a night of mariachi music, and Haydn’s Creation. The Grant Park Chorus’s 60th-anniversary concert on August 4 will feature Christopher Bell leading music by Ēriks Ešenvalds, Ola Gjeilo, Abbie Betinis, Eric Whitacre, Morten Lauridsen, and Samuel Barber. On August 3, Carlos Kalmar will lead the Grant Park Orchestra and Mariachi Herencia de México in traditional Mexican folk music; there will be a free pre-concert dance demonstration by BYNC Ballet Folklorico. Other Grant Park Orchestra programs will feature the world premieres of Christopher Theofanidis’s Flute Concerto with flute soloist Marina Piccinini and Carl Vine’s Zofomorphosis featuring the orchestra and piano duo ZOFO, plus Berlioz’s Symphonie Fantastique, Augusta Holmès’s Andromède, Franck’s Symphony in D minor, Libby Larsen’s Deep Summer Music, and violinist Christian Tetzlaff as soloist in Shostakovich’s Violin Concerto No. 1. The festival will conclude with a pair of concerts featuring Haydn’s Creation with the Grant Park Orchestra and Chorus and vocal soloists. For most Grant Park Music Festival concerts, bag checks will be implemented to prohibit firearms, knives, and other weapons.