Only introduction in history is this idea to isolate a region, naqual all the civil life was subordinated to the exploration of umbem exclusive of the crown. Spix & Martius. Trip for Brazil. The discovery of rich deposits in the end of Century XVII led to the immediate displacement of great population contingents for the region of the Mines. A consequence of this was the sprouting of numerous urban nuclei in the immediacy of the mining areas.
With passing of the time, being necessary on the part of the Metropolis a bigger control of the region, some of these situated nuclei in places strategical and generally next you cultivate to them had been raised to the condition of Village, receiving a bigger governmental apparatus. In the region of Cold Serro they had appeared innumerable nuclei mineradores that after certain time if had become arraias, as in the other parts of the region. In 1720 the Captainship of Minas Gerais was created, desmembrada of So Paulo, because the Crown needed to have more control on this part of the Colony, that exactly with the mining but also how much to the social life that if constitua, over all in the urban nuclei. The Arraial of the Tejuco, current Diamantina, appeared as the other urban nuclei of its time, in function of the existence and posterior auriferous exploration. The arraiais had been proliferating to the rhythm of the discoveries of new lodes in the regatos and grupiaras was spread for contiguous areas, on account in this had been composing an urban net ‘ ‘ throughout the ways and roads in the crossroads or the passages of courses d’ water, the edge of the places where the gold and the diamond were encontrados’ ‘ they were oriented for the ways, configuration that if observes in the first nuclei of povoamento, as we read in the words of Silvio de Vasconcellos: (…) its streets are always old roads.