The Academy of Music in Philadelphia, Pennsylvania is one of the oldest halls in the United States. It was built in the middle of the nineteenth century to the measurements of 31.1m x 17.7m x 19.5m. It seats 2,984 people 1,295 seats on the main floor, 540 on the first balcony, and 570 on the third balcony, and has a volume of 15,100 cubic meters. The hall still has all of it's original features.