Suor Barbara Ragnoni (1448–1533)Nouvelles sources et nouvelles méthodologies de recherche dans les études sur les femmes, Harmattan, 2004 was an Italian artist for whom only one work remains extant.
Her signed painting, The Adoration of the Shepherds, is now in the Pinacoeteca of Siena. The style of the painting, with its warm colors, is very much in keeping with the late quattrocento style.
References
Women Painters of the World, Page 35