María Cayetana de Silva, 13th Duchess of Alba María Cayetana de Silva, 13th Duchess of Alba María del Pilar Teresa Cayetana de Silva-Álvarez de Toledo y Silva, 13th Duchess of Alba, GE (full name, see infobox; 10 June 1762 – 23 July 1802), was a Spanish aristocrat and a popular subject of the painter Francisco de Goya y Lucientes. María del Pilar Teresa Cayetana de Silva Alvarez de Toledo became the 13th Duchess of Alba in 1776. Her marriage to José Álvarez de Toledo, 11th Marquis of Villafranca, made her and her husband the wealthiest couple in the Kingdom of Spain; their only rivals to this title were
Enlightenment in Spain such as La Condamine and Alexander von Humboldt, to its overseas empire, usually closed to foreigners. There were extended Royal Botanical Expeditions to Chile and Peru (1777–88), New Granada (1783–1816), and New Spain (1787–1803), which produced a huge number of detailed botanical drawings and specimens destined for the Royal Botanical Garden and the Royal Natural History Cabinet in Madrid. The Malaspina Expedition was an important scientific expedition headed by Spanish naval commander Alejandro Malaspina over five years (1789–94), with naturalists and botanical illustrators gathering information for the Spanish crown. The illustrators on the voyage included José de Pozo, trained at