The marquise was the foundress of a charity, "Amis de Salzbourg", that provided bursaries for young Belgian musicians to visit the Salzburg Festival. This later became the "Association mozartienne de Belgique". After the German annexation of Austria in 1938 she turned her attention to organising benefit concerts in Brussels to support needy musicians, continuing to host concerts even during the German occupation. In the later 1930s she was also a member of CABEM (Comité de Rapatriement et d'Assistance aux Asiles de l'Ambassade de Belgique à Madrid), an organisation assisting Spanish refugees.