With the concert hall Muth (music and theater) in Vienna's Augarten of "archipelago architecture + communication", the Vienna Boys' Choir Open for the first time in their own culture and meeting the regional and international audience. The external appearance of the concert hall is determined by a folded building envelope made of titanium-zinc, which distinguishes itself by concise folds and the heart inside the building structure - the concert hall - maps. Compared with a cool and restrained color and material choice of the building envelope, the hall of rich colors, warm materials and a brilliant surround sound is determined. The concert hall is fully lined with walnut wood. The structure of the wall and ceiling surfaces, the galleries and the parapets produces a very specific room atmosphere and a new high-quality sound and event room for Vienna. With photographs by Rupert Steiner and Katarina Soskic. With an essay by Christian Kuhn and a conversation between Bernd Quiring and John Kraus.