Diego Fernández de Córdoba, 1st Marquess of Guadalcázar
For an earlier Spanish adventerer and chronicler, see Diego Fernandez
Diego Fernández de Córdoba, Marqués de Guadalcazar and Conde de Posadas (born in Seville, Spain around 1580; died around 1630 in Cordoba, Spain) was Viceroy of New Spain from 1612-1621 and of Peru from 1621-1629.
During his mandate in New Spain, he ended the uprising of the Tepehuanes in Sinaloa and founded many cities, such as Lerma (1613), Cordoba (1618), and Guadalcázar (1620). He contructed the Fort of San Diego in Acapulco and improved the sanitation and water supply of Mexico City, completing the aquaduct from Chapultepec. Due to this, he recieved the nickname el Buen Virrey (The Good Viceroy).
As viceroy of Peru, he reformed the fiscal system and stopped the inter-family rivalry that was bloodying the domain. He also fortified Lima against pirate attacks. In 1629 he gave up his charge and returned to Spain, where he died the following year.