In May 1920, Arnold Schönberg undertook a pilgrimage to the Mahler Festival in Amsterdam with family, friends and representatives of Vienna’s cultural life, organized by Willem Mengelberg, director of the Concertgebouw Orchestra. Apart from Schönberg’s family, other persons from Vienna were along: his pupils Egon Wellesz and Anton Webern, music critics Richard Specht and Paul Stefan, poet Felix Salten, Guido Adler from the University of Vienna, publisher Emil Hertzka, Hugo Botstiber from the Vienna Konzerthaus and his wife. There were also guests from Italy and France: composers Alfredo Casella and Florent Schmitt. Performers included Willem Mengelberg, Gertrude Förstel, Alexander Schmuller, Carl Flesch, Adolf Busch, Leonid Kreutzer and Arthur Schnabel. The photo shows among others: Egon Wellesz, Gertrude Förstel, Tilly Mengelberg, Alexander Schmuller, Emil Hertzka, Alma Mahler, Guido Adler, Arnold Schönberg, Anton Webern, Mathilde Schönberg, Richard Specht, Leonid Kreutzer, Luisa Botstiber, Hugo Botstiber, Carl Moll.