Two years later, on June 15, 1573, Moya de Contreras was chosen Archbishop of Mexico and consecrated bishop on November 21, 1573, by Antonio Ruíz de Morales y Molina, Bishop of Tlaxcala (Puebla de los Angeles). He served until 1591, the year of his death. In 1585 he convoked and presided at the Third Provincial Council of the Church in Mexico, which established standards for the Church that endured to the end of the colonial era. This council banned the enslavement of the Indians. As both archbishop and viceroy, one of his major concerns was education of the Indians. He founded the Seminary of the Indies, to teach them Christian doctrine, reading, writing, singing and trades.