Wien, Italy
A concert hall and multi-purpose auditorium for the Vienna Boys Choir, opened in 2012. A calendar of upcoming events is published [http://www.muth.at/en/programm/ here]; tickets can be purchased at the door or online.
Listen to the audio guide for MuTh Konzertsaal der Wiener Sängerknaben Free on WIP — starts by itself when you arrive, even with the screen off