The existing museum was designed according to values that are no longer relevant to modern society. These institutionalized structures formed in Europe in the 19th century and imposed on the world have been minimally reformed since. The thesis explores the role of design to propose a possible restructuring of the museum to a post-museum by the means of speculative design. The design objectives of the museum were investigated to propose an alternative based on cultural theories and research. Employing an iterative design process, the context of art in the exhibition space and the authority assigned to such space has been challenged. New arising movements around the post-museum are speculated exploring future scenarios of the authority of art.