MMM, «Mies Missing Materiality», has been the installation that architects Anna & Eugeni Bach, have set during a few days in November 2017 at the Mies Van Der Rohe Pavilion in Montjuïc, Barcelona. It is well known that the current pavilion is a thirdy-year old reconstruction of the original 1929 building and, therefore, is almost a fake, a replica made in the same place, with the same sizes and the same materials