The Duchess of Malfi
http://www.gradesaver.com/the-duchess-of-malfi/e-text/
The full e-text of the play.
Giovanni D’Aragona portrait
http://theborgias.wetpaint.com/photo/11234102/Giovanna+d%27Aragona+%28%3F%29
A portrait thought to be Giovanni D’Aragona, the historical figure that the Duchess of Malfi was based on.
John Webster
http://www.luminarium.org/sevenlit/webster/webbio.htm
A biography of John Webster
The King's Men
http://www.bl.uk/treasures/shakespeare/companies.html
Information about The King's Men, who first performed The Duchess of Malfi, as well as other acting troupes of the period.