Lady María Josefa de Borja Pimentel y Téllez-Girón iure uxoris Duchess of Osuna, suo jure 12th Duchess of Benavente (26 November 1752 – 5 October 1834), was a Spanish Salonnière, famous as a patron of artists, writers and scientists and an important figure of the Spanish Age of Enlightenment.

It was a substantial pioneer role, since learned societies and academies was an important part of the Age of Enlightenment, but women's inclusion in them had been posed until the establishment of the Junta de Damas.

[5] She used her chairmanship to engage the society in work such as the education of poor girls and the rehabilitation of women criminals.

The Duchess not only purchased one of the first editions of Los Caprichos, but also commissioned a series of cabinet paintings on the subject of witchcraft from Goya, amongst them El aquelarre (Witches' Sabbath).

In the famous portrait Goya painted of her, she is shown standing with noble reserve, and dressed according to the fashion initiated by Queen Marie Antoinette in Paris at that time.