In the world today, Concert Halls for Symphony Orchestra and Choir are generally 'enclosed performance spaces' that are completely cut-off from the outside: Whether it's a time of daylight or moonlight, rain or shine, summer or winter, spring or autumn, the environment within remains the same all the time. I asked the question: 'What if a concert hall offers views outside?' To be more specific, the question is: 'What if a concert hall offers views outside through the use of glass, along with other building materials, despite the fact that glass offers lower reflectivity and lower transmission...