Magdalena told padre Francisco Franco about this discovery, who then told Captain Miguel Caldera, who took possession of the place from the indigenous peoples for the Viceroyalty of New Spain. Captain Caldera sent Gregorio de León, Juan de la Torre, and Pedro de Anda to verify the existence of the minerals. The latter named the locality San Pedro del Potosí, to honor his namesake saint and in memory of the famous mines of the Potosí in Alto Perú of the Viceroyalty of Peru, in present-day Bolivia.