Cloud '68-Paper Voice pays homage to the European radical movements in architecture that flourished between the 1950s and 1970s producing a wide range of experimental expression. From the personal collection of the Chilean architect Smiljan Radic, a selection of 173 graphic pieces-lithographs, drawings, original etchings, and ephemera-will show the horizon of meaning of the diverse architectural approaches from those years: works by Constant, Guy Debord, Asger Jorn, Haus-Rucker-Co, Archigram, ...