SANTIAGO, Chile — Walk down a flight of stairs and open the door. The door closes behind you and you find yourself in a dark room. You disappear; you can’t leave the space and don’t have a point of reference. A few minutes later, 500 silhouettes of the heads of 500 different people throw a diffuse white light — you find yourself gathered with people, some dead, some disappeared, and some others still alive. You are one of the victims of Chile’s dictatorial period. Finally the door opens and you go outside, warmed again by the natural light of the sun. You have just visited the installation “Geometria de la Conciencia” (“Geometry of the Conscience”) by Alfredo Jaar. You are in the Museum of Memory and Human Rights of Santiago, Chile.