Villanueva makes a copy of an original document that refers to the background of the project to establish a new cathedral in Nuevo Santander. The informes of Escandon and the actions of the Villanueva, referring to the construction, the name of the new cathedral as nuestra Senora de la concepcion; original idea of a cathedral was conceived by Phelipe primero; the adjudication of the Diezmos for the new church, the original document was written in Madrid September 9, 1775; official nomination from the king of Belena as responsible for the territorial division of the church of Nuevo Reyno de Leon. Belena sends a letter to obispo de Nuevo leon requesting a copy of the bula properly translated to follow the regulations made by the santidad. Belena receives from the secretaria de Camara del virreynato 4,516 foxas with 61 caratulas as antecedents to begin with the construction of the new cathedral, a brief description of the 61 caratulas is presented. (D. Bautista, February 1990)