The Compañía Bancaria Católica de México is a financial institution remarkable for its confessional dimension, operating in the Mexico of the turn of the 20th century under the authority of Porfirio Díaz. This acción No. 02138 of Series A, with a nominal value of $100, was issued on 14 December 1904 in Mexico City, with numerous coupons still present. The Porfiriato (1876-1911) was a period of accelerated economic modernization in Mexico, marked by the creation of numerous banks and commercial companies. The originality of this Catholic institution lies in its ties to ecclesiastical networks and conservative Catholic elites, in a context of historical tensions between Church and State in Mexico. It illustrates the persistence of a confessional economic network parallel to the secular banking institutions of the time. The Mexican Revolution (1910-1920) put an end to the activities of many companies of this kind.