In comparison with museum building, theatre architecture has led a wallflower existence for a long time. Since the late 1990s, however, concert halls like Jean Nouvel’s KKL in Lucerne, Frank Gehry’s Disney Concert Hall in Los Angeles, Santiago Calatrava’s auditorium in Santa Cruz de Tenerife and the “Wolkenturm” open-air stage in Grafenegg by The next ENTERprise (ill. 9) have become...