Diego Morcillo Rubio de Auñón

Mata had also been serving on an interim basis, since the removal of Viceroy Diego Ladrón de Guevara on March 2, 1716.

Morcillo occupied this post until October 5, 1716, when the position was taken up by Carmine Nicolao Caracciolo, Prince of Santo Buono, the official successor of Ladrón de Guevara.

Among his political accomplishments were a great increase in royal revenues from the colony, and the repulse of the English pirates on the coast.

Morcillo donated large sums of money to the Trinitarian Order, to charitable works such as hospitals and schools, and for a convent for Discalced Carmelites in the town of his birth.

In a series of letters with the Royal Court of Charcas, he emphasized that the choice of governor was not a judicial matter, that the judge's trial was irregular and invalid, and that Reyes should be restored to his position promptly.