Boettcher Concert Hall

Located in Denver, Colorado, it is the first symphony hall in the round in the United States. It was built in 1978 as a home for the Denver Symphony Orchestra, and is the current home of The Colorado Symphony Orchestra. The hall is part of the Denver Performing Arts Complex, the second largest performing arts complex in the United States next to Lincoln Center in New York. The theater underwent a major acoustical renovation in 1993. The height of the seat backs were adjusted, additional acoustic reflectors were added, and acoustic curtains were installed which allow the theater to be tuned for specific performances--even during a performance.