アスペン音楽祭
In 1949 Paepcke made Aspen the site for a celebration of the 200th birthday of Johann Wolfgang von Goethe. Albert Schweitzer, José Ortega y Gasset, Thornton Wilder, and Artur Rubinstein all attended the celebration. The next year, Paepcke created what is now the Aspen Institute. Walter and Elizabeth founded the Aspen Music Festival and School in 1949, and Walter served as the festival's director until 1954 when he appointed baritone Mack Harrell to take over.