On Michigan Avenue in Chicago, facing Buckingham Fountain, there is a ten-storey building, Auditorium Building, translated as "Hall Building" or "Auditorium Building". It's not very noticeable in the skyscrapers on Michigan Avenue. The grey appearance, three low arches, with more obscure side doors. Despite being insignificant, there are quite a few people here. The main entrance (arch) is Roosevelt University, which can be visited. Side doors enter the headquarters of the famous Chicago Symphony Orchestra, where people with cassettes on their backs go in and out, and you may come across a musician by accident. The internal elevator is also old-fashioned. The following pictures show the interior of the Hall Building.