Baptism is one of the main sacraments of the Catholic Church. For this reason, it is a fundamental event in which participating family and included a key figure : the  godparents. But analyzing the parish registers it is found that the expected solemnity of celebrating the ceremony in the parochial church of Cordoba of Tucumán during the XVIIIth century was not frequent since there were numerous baptisms celebrated at home. This study analyzes the practices of baptism and its relationship with the institution of patronage to see if there were differences between the conceptions that had the Catholic Church and the faithful. This is to verify whether one can speak of an evolution of social content associated with baptism as well as to godparenthood. To achieve a series of parish registers of the city of Córdoba in the seventeenth and eighteenth centuries will be analyzed to detect the possible variation of practices.