Auditorium Building - Credit: Wikimedia Commons
The Auditorium Building in Chicago is one of the best-known designs of Louis Sullivan and Dankmar Adler. Completed in 1889, the building is located at the northwest corner of South Michigan Avenue and Ida B. Wells Drive. The building was designed to be a multi-use complex, including offices, a theater, and a hotel. As a young apprentice, Frank Lloyd Wright worked on some of the interior design. Read more on Wikipedia
Source: en.wikipedia.org