Sources

Berger, J. (1972). Ways of seeing. Penguin Books. 

de Voragine, J. (1998). The golden legend: Selections (C. Stace, Trans.). Penguin Classics. (Original work published ca. 1229-1298)

Ruben, P.P. (1638). Helena Fourment in a fur coat [Oil on canvas]. Kunsthistorisches Museum Wien, Vienna, Austria. Retrieved March 2016 from https://www.khm.at/Archiv/Ausstellungen/rubens/_E/frame02be_E.html