 In 1653 he was named Viceroy and Captain General of Navarre.For his valuable diplomatic services in the negotiation of the 1659 Peace of the Pyrenees and the subsequent marriage of Princess Maria Teresa of Austria with Louis XIV of France, King Philip IV made him Marquis de Solera.His writings included "Epigramas latinos del humanista giennense D. Diego de Benavides y de la Cueva" (Latin epigrams) and "Horae succisiuae siue Elucubrationes".