Widely recognised as Gustav Mahler's pre-eminent biographer, Henry-Louis de La Grange (1924–217) – author of the 4-volume, 5,-page definitive study of the composer's life and work – was awarded a professorship by the government of Austria and an honorary Doctorate from the Juilliard School of Music. He lectured extensively, organised concerts, exhibitions, and music festivals, and contributed to film documentaries and radio features.
Together with Maurice Fleuret he founded the Médiathèque Musicale Mahler in Paris. German musicologist and conductor Sybille Werner started working with Henry-Louis de La Grange in 23. She has repeatedly lectured and published on the performance history of Mahler's works, and in 218 received the Mahler Award of the Sociedad Mahler Mexico. Her conducting activities have taken her beyond New York, her former residence, and the USA to Germany, Italy, Japan, Mexico, Poland, and the UK.
Currently she is based in Toblach and associated with the Gustav Mahler Music Weeks.