Therefore we say that history if dedicates to study today something that is not in the gift, but is represented and tematizado in the document. History wants to know where they are the roots of the acts and behaviors that today we reveal. How and where circumstances they had been produced? How and where circumstances we become in them what we are? Periodizao One of the serious problems to study history is the dates. Much people, still think that the dates are the center of history. But not. The dates are only instruments for the localization of the facts; are created conventions to determine the indeterminate one, the time. What it matters for history is the fact. The more specifically interpretation that if can make of the fact.
Of this form, for not arresting in them to the dates and nor losing in them in the time, us we use as limiting of time spaces. We stipulate the division of secular spaces that we call of dates. To study history we choose circumscribed facts the stipulated spaces of time and we confer them some meaning. Of the point of view of history, we look for to adjust facts and dates, looking for its meaning and its localization in the time stipulated. Of this form, when we intend to locate a fact we can look using it a Line of the Time that is a form, also stipulated, for the visualization of a succession of events. To make this we place in a traced line a succession of dates related to the facts in question. This procedure helps to visualize something intangible as time. In the same way that in relation to the dates and the historical facts, here also we cannot forgetting in them that we are using a didactic resource. A resource that can help in the agreement of the concepts of passed and present, beyond in the distance that it separates in them of the studied facts.