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The United Center is a sports arena in Chicago, Illinois, named after its corporate sponsor, United Airlines, located at 1901 W. Madison Street, west of downtown, which is home to both the Chicago Blackhawks and the Chicago Bulls. The plan to build the arena was created by Bill Wirtz and Jerry Reinsdorf, the owners of the two sports teams, respectively. The United Center's predecessor was the indoor Chicago Stadium, which was demolished after the United Center opened for business on August 18, 1994.