Jean Dubuffet has never ceased to question the field of art and its boundaries, participating in his time in a radical critique of the definition of the discipline. What about this field today?

Heinrich Rieder, creator and sculptor of carnival masks for the Lötschental, talks about his current practice and the stakes that exist in the definition of the "authentic" mask in relation to artistic reappropriation. A unique face-to-face encounter between his contemporary Lötschental masks and the MEG masks that so fascinated Dubuffet during his visit to the Museum in 1945.