This paper presents three models of diagrams. Each of one shows a different way to represent a cultural view of the world. First of them, the diagram, owns a bidimensional nature and requires a logical participation. The second one, the plastic diagram or mándala, presents the inner structure of an aspect of the reality. At the same time, the plastic diagram can be understood as a double of the reality. The third model, the hologram, does not possess inner world. This last model keeps relation with a spectral world, with a virtual world. By means of its incorporeal essence, we recognize our contemporary world, our contemporary existence.