Grand Inquisitor
He was appointed Grand Inquisitor of Spain on December 24, 1774. As Grand Inquisitor, he continued the suppression of Jansenism in Spain. He oversaw the heresy trial of Pablo de Olavide in 1775. He acted as patron of Pedro Estala. José Francisco de Isla wrote satire directed at Beltrán. Beltrán received the Order of Charles III in 1780.