Portrait of Ortensia Mancini, duchess of Mazzarino

The
  woman was portrayed during her stay in Rome. In
  those years Jacop Ferdinand Voet painted thirty-seven portraits of
  "ladies" and the fortune of the cycle engaged the painter and his
  workshop in a series of replicas for the top Roman aristocracy. The duchess
  is shown three-quarter length, with her torso turned slightly towards the
  dark background. The
  details of her dress are rendered with extreme virtuosity, using brilliant
  chromatics.