“The third principal composer in the Vereinigung schaffender Tonkünstler was Karl Weigl. Like Schoenberg, he was a pupil of Zemlinsky and, like Webern and Wellesz, he studied musicology with Adler. In common with Mahler, Wolf, Schreker, Franz Schmidt and many of the most significant Viennese composers of the day, his composition teacher was Robert Fuchs. In 1904, Mahler appointed Weigl as principal coach at the Hofoper and during these years Weigl focused on composing Lieder.”

– from Forbidden Music