World Music Theatre (Ozzfest)

Credit Union 1 Amphitheatre (originally World Music Theatre and formerly New World Music Theatre, Tweeter Center, First Midwest Bank Amphitheatre and Hollywood Casino Amphitheatre) is an outdoor music venue located in Tinley Park, Illinois, that opened in 1990 and was built by Gierczyk Development. It is one of the largest music venues in the Chicago area, with a capacity of up to 28,000 spectators: 11,000 reserved seats and 17,000 lawn seats. Nederlander Concerts and Jam Productions co-managed the venue from 1994 to 1999. Hollywood Casino acquired the naming rights, beginning in 2015. The venue is owned by Live Nation.