The Auditorium Building in Chicago is one of the best-known designs of Dankmar Adler and Louis Sullivan. Completed in 1889, the building is located on South Michigan Avenue, at the northwest corner of Michigan Avenue and Congress Parkway. It was added to the National Register of Historic Places on April 17, 1970. It was declared a National Historic Landmark in 1975, and was designated a Chicago Landmark on September 15, 1976. In addition, it is a historic district contributing property for the Chicago Landmark Historic Michigan Boulevard District. The Auditorium Theatre is part of the Auditorium Building and is located at 50 East Congress Parkway. The theater was the first home of the Chicago Civic Opera and the Chicago Symphony Orchestra.