On 12 October 1709 the vote of the notables was held on the founding of the Royal de Minas, eight of them were manifested because they were it was located in Santa Eulalia itself, while the remaining eight did so for the foundation in the valley. Faced with the tie, the governor Deza and Ulloa intervened with his vote of quality by demonstrating for the foundation of the population in the valley of the junta de los ríos; this is what is seen as the official foundation of Chihuahua and Antonio Deza and Ulloa as its founder. The new Real de Minas was founded under the name of "Real de Minas de San Francisco de Cuéllar" in honor of the then Viceroy of New Spain, Francisco Fernández de la Cueva Enríquez, 10th. Duke of Alburquerque and Marquis de Cuéllar.