The Centro Espigas of the Escuela de Arte y Patrimonio (EAyP) in collaboration with the Fundación Espigas and the Centro de Investigaciones en Arte y Patrimonio (CIAP) of the Universidad Nacional de San Martín, Consejo Nacional de Investigaciones Científicas y Técnicas (UNSaM-CONICET), present a new series of critical studies on documents held in Espigas. These editions introduce from different perspectives: the historical significance, the social actors and institutions involved, the circulation or uses, to the conditions of production and the textual or visual complexity of the documents.