In 1693, to plans by Johann Bernhard Fischer von Erlach, 96 arcaded boxes for spectators were cut in the rock wall of the Mönchsberg around the courtyard of the Felsenreitschule. Since the 1920s, this arena has been used for open-air performances as part of the Salzburg Festival, and over the years, it has undergone various extensions. In 1969, for example,...