The objective of this dissertation is to understand the task of the historian, according to Walter Benjamin, as the construction of an interpretation. Although constructed, interpretation is not arbitrary - it must be capable to present historical truth. To accomplish such task, the interpretation should get closer to philosophical contemplation. The object of contemplation is the idea, that should not be understood as something restricted to the scope of thought, but as Being. The idea is Being because it carries material elements inside. This does not mean, however, that it could be found in empirical world. On the contrary, material elements appears only for the mimetic faculty. This faculty is capable to perceive similarities between elements apparently heterogeneous, placing them in a tension state. The idea is the image formed by this configuration, in which it is found historical truth.